General Purpose USS & SAE Washers
Discover our range of Grade 5, Grade 8 and Nylon Flat Washers, designed to meet various assembly needs, offering durability, corrosion resistance and precision load distribution. These durable flat washers are ideal for secure fastening for industrial applications like construction, heavy machinery, mining and offshore drilling.
Grade 8 (USS) Flat Washers - Yellow Zinc Plated
Made for heavy loads, these yellow zinc‑plated Grade 8 (USS) washers offer enhanced thickness to resist dishing. Their close‑fitting ID boosts clamp capability, while the corrosion‑resistant finish extends service life. Pair with Grade 8 bolts for reliable performance in structural or industrial assemblies.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 9/32" | 3/4" | 5/64" | 100 |
373804
|
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| 1/4" | 9/32" | 3/4" | 5/64" | 200 |
3738041
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| 1/4" | 9/32" | 3/4" | 5/64" | 500 |
3738042
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| 5/16" | 11/32" | 7/8" | 3/32" | 100 |
373805
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| 5/16" | 11/32" | 7/8" | 3/32" | 200 |
3738051
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| 5/16" | 11/32" | 7/8" | 3/32" | 500 |
3738052
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| 3/8" | 13/32" | 1" | 3/32" | 100 |
373806
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| 3/8" | 13/32" | 1" | 3/32" | 200 |
3738061
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| 7/16" | 15/32" | 1-1/4" | 3/32" | 50 |
373807
|
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| 7/16" | 15/32" | 1-1/4" | 3/32" | 100 |
3738071
|
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| 1/2" | 17/32" | 1-3/8" | 1/8" | 50 |
373808
|
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| 1/2" | 17/32" | 1-3/8" | 1/8" | 100 |
3738081
|
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Grade 8 (SAE) Flat Washers - Yellow Zinc Plated
Engineered for severe workloads, these Grade 8 (SAE) washers feature a thicker design and yellow zinc finish for added corrosion resistance. A tight ID offers stable clamp force, especially in automotive or heavy machinery. Pair with Grade 8 bolts to prevent distortion in demanding applications.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 9/32" | 5/8" | 5/64" | 100 |
373904
|
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| 1/4" | 9/32" | 5/8" | 5/64" | 200 |
3739041
|
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| 1/4" | 9/32" | 5/8" | 5/64" | 500 |
3739042
|
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| 5/16" | 11/32" | 11/16" | 3/32" | 100 |
373905
|
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| 5/16" | 11/32" | 11/16" | 3/32" | 200 |
3739051
|
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| 5/16" | 11/32" | 11/16" | 3/32" | 500 |
3739052
|
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| 3/8" | 13/32" | 13/16" | 3/32" | 100 |
373906
|
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| 3/8" | 13/32" | 13/16" | 3/32" | 200 |
3739061
|
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| 7/16" | 15/32" | 59/64" | 3/32" | 100 |
373907
|
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| 7/16" | 15/32" | 59/64" | 3/32" | 200 |
3739071
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| 1/2" | 17/32" | 1-1/16" | 7/64" | 50 |
373908
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| 1/2" | 17/32" | 1-1/16" | 7/64" | 100 |
3739081
|
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Grade 8 (USS) Extra Thick Flat Washers - Yellow Zinc Plated
Built for hefty clamp loads, these extra‑thick Grade 8 (USS) washers provide superior resistance to dishing or distortion. Yellow zinc plating helps guard against rust in heavy‑duty machinery. Pair with Grade 8 bolts and nuts in industrial or automotive assemblies needing maximum load stability.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 5/16" | 3/4" | 7/64" | 50 |
373754
|
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| 5/16" | 3/8" | 7/8" | 1/8" | 50 |
373755
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Package Weight: 0.7 lbs
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| 3/8" | 7/16" | 1" | 1/8" | 50 |
373756
|
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Package Weight: 1.1 lbs
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| 7/16" | 1/2" | 1-1/4" | 9/64" | 25 |
373757
|
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Package Weight: 0.9 lbs
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| 1/2" | 9/16" | 1-3/8" | 11/64" | 25 |
373758
|
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| 9/16" | 5/8" | 1-1/2" | 11/64" | 25 |
373759
|
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| 5/8" | 11/16" | 1-3/4" | 3/16" | 25 |
373760
|
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| 3/4" | 13/16" | 2" | 3/16" | 10 |
373762
|
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Package Weight: 1.4 lbs
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| 7/8" | 15/16" | 2-1/4" | 1/4" | 10 |
373764
|
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Package Weight: 2.2 lbs
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| 1" | 1-1/16" | 2-1/2" | 1/4" | 10 |
373766
|
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Package Weight: 2.7 lbs
|
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Grade 8 (SAE) Extra Thick Flat Washers - Yellow Zinc Plated
Thicker than standard washers, these Grade 8 (SAE) washers distribute force more evenly to reduce distortion under high torque. A yellow zinc plating wards off corrosion, extending service life. Use them with Grade 8 bolts in challenging MRO or industrial tasks demanding extra strength.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 9/32" | 5/8" | 7/64" | 50 |
373704
|
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| 5/16" | 11/32" | 11/16" | 1/8" | 50 |
373705
|
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|
Package Weight: 0.4 lbs
|
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| 3/8" | 13/32" | 13/16" | 1/8" | 50 |
373706
|
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|
Package Weight: 0.7 lbs
|
||||||
| 7/16" | 15/32" | 59/64" | 9/64" | 25 |
373707
|
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|
Package Weight: 0.5 lbs
|
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| 1/2" | 17/32" | 1-1/16" | 11/64" | 25 |
373708
|
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| 9/16" | 21/32" | 1-3/16" | 11/64" | 25 |
373709
|
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| 5/8" | 11/16" | 1-5/16" | 3/16" | 25 |
373710
|
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| 3/4" | 13/16" | 1-15/32" | 3/16" | 10 |
373712
|
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Package Weight: 0.6 lbs
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| 7/8" | 15/16" | 1-3/4" | 1/4" | 10 |
373714
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Package Weight: 1.1 lbs
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| 1" | 1-1/16" | 2" | 1/4" | 10 |
373716
|
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Package Weight: 0.1 lbs
|
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| 1-1/8" | 1-1/4" | 2-1/4" | 1/4" | 5 |
373718
|
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| 1-1/4" | 1-3/8" | 2-1/2" | 1/4" | 5 |
373720
|
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Package Weight: 1.1 lbs
|
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Grade 8 (USS) Flat Washers - Plain Finish
Designed for top‑tier strength, these plain‑finish Grade 8 (USS) washers withstand high torque while preventing dishing. Their burr‑free construction helps maintain proper clamp load in demanding machinery or automotive applications. For a robust joint, match with Grade 8 cap screws.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 5/16" | 3/4" | 1/16" | 100 |
377934
|
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Package Weight: 0.6 lbs
|
||||||
| 5/16" | 3/8" | 7/8" | 5/64" | 100 |
377935
|
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| 3/8" | 7/16" | 1" | 5/64" | 100 |
377936
|
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|
Package Weight: 1.3 lbs
|
||||||
| 7/16" | 1/2" | 1-1/4" | 5/64" | 100 |
377937
|
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| 1/2" | 9/16" | 1-3/8" | 7/64" | 50 |
377938
|
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|
Package Weight: 1.8 lbs
|
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| 9/16" | 5/8" | 1-1/2" | 7/64" | 50 |
377939
|
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Package Weight: 2.2 lbs
|
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| 5/8" | 11/16" | 1-3/4" | 1/8" | 50 |
377940
|
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|
Package Weight: 3.6 lbs
|
||||||
| 3/4" | 13/16" | 2" | 1/8" | 10 |
377942
|
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| 7/8" | 15/16" | 2-1/4" | 5/32" | 10 |
377944
|
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Package Weight: 1.3 lbs
|
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| 1" | 1-1/16" | 2-1/2" | 5/32" | 10 |
377946
|
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|
Package Weight: 1.6 lbs
|
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| 1-1/8" | 1-1/4" | 2-3/4" | 5/32" | 5 |
377948
|
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| 1-1/4" | 1-3/8" | 3" | 5/32" | 5 |
377950
|
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|
Package Weight: 1.1 lbs
|
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Grade 8 (SAE) Flat Washers - Plain Finish
Enhance load distribution in high‑stress assemblies with these Grade 8 (SAE) flat washers. Plain‑finish steel resists dishing for better torque control, while a thicker design handles heavy loads in engines or industrial machinery. Match with Grade 8 fasteners for durable, secure connections.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 9/32" | 5/8" | 5/64" | 100 |
377904
|
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|
Package Weight: 0.5 lbs
|
||||||
| 5/16" | 11/32" | 11/16" | 3/32" | 100 |
377905
|
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| 3/8" | 13/32" | 13/16" | 3/32" | 100 |
377906
|
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|
Package Weight: 0.7 lbs
|
||||||
| 7/16" | 15/32" | 59/64" | 3/32" | 100 |
377907
|
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| 1/2" | 17/32" | 1-1/16" | 7/64" | 50 |
377908
|
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| 9/16" | 19/32" | 1-3/16" | 7/64" | 50 |
377909
|
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|
Package Weight: 1.2 lbs
|
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| 5/8" | 11/16" | 1-5/16" | 1/8" | 50 |
377910
|
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|
Package Weight: 1.7 lbs
|
||||||
| 3/4" | 13/16" | 1-15/32" | 9/64" | 25 |
377912
|
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| 7/8" | 15/16" | 1-3/4" | 9/64" | 10 |
377914
|
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|
Package Weight: 0.7 lbs
|
||||||
| 1" | 1-1/8" | 2" | 9/64" | 10 |
377916
|
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|
Package Weight: 0.9 lbs
|
||||||
| 1-1/8" | 1-1/4" | 2-1/4" | 9/64" | 5 |
377918
|
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|
Package Weight: 0.6 lbs
|
||||||
| 1-1/4" | 1-3/8" | 2-1/2" | 5/32" | 5 |
377920
|
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|
Package Weight: 0.7 lbs
|
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Grade 8 (USS) Flat Washers - Armor Coat™
Featuring a proven Armor Coat™ finish, these Grade 8 (USS) washers withstand extreme corrosion tests and offer 150,000 PSI tensile strength. They excel in harsh MRO environments where stainless steel might fail. Pair with Armor Coat™ Grade 8 bolts for maximum toughness in off‑road or marine machinery.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 5/16" | 3/4" | 1/16" | 100 |
376104
|
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| 5/16" | 3/8" | 7/8" | 1/16" | 100 |
376105
|
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| 3/8" | 7/16" | 1" | 1/16" | 100 |
376106
|
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| 7/16" | 1/2" | 1-1/4" | 1/16" | 100 |
376107
|
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| 1/2" | 9/16" | 1-3/8" | 7/64" | 50 |
376108
|
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| 5/8" | 21/32" | 1-3/4" | 7/64" | 25 |
376110
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| 3/4" | 13/16" | 2" | 1/8" | 25 |
376112
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Grade 8 (SAE) Flat Washers - Armor Coat™
Armor Coat™ delivers exceptional corrosion resistance on these Grade 8 (SAE) washers, passing 1,000‑hour salt spray tests. They’re up to 250% stronger than stainless steel, making them ideal for marine, chemical, or off‑road applications. Use with Armor Coat™ Grade 8 bolts for a tough, long‑lasting assembly.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 9/32" | 5/8" | 1/16" | 100 |
376004
|
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| 5/16" | 21/64" | 11/16" | 1/16" | 100 |
376005
|
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| 3/8" | 25/64" | 13/16" | 1/16" | 100 |
376006
|
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| 7/16" | 15/32" | 59/64" | 1/16" | 100 |
376007
|
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| 1/2" | 17/32" | 1-1/16" | 7/64" | 50 |
376008
|
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| 5/8" | 45/64" | 1-5/16" | 7/64" | 25 |
376010
|
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| 3/4" | 53/64" | 1-15/32" | 1/8" | 25 |
376012
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Grade 5 (USS) Flat Washers - Zinc Plated
Zinc‑plated for moderate corrosion resistance, these Grade 5 (USS) washers ensure smooth load distribution under standard‑duty bolts. Burr‑free edges aid controlled torque, making them perfect for automotive or mechanical repairs. For best results, pair with Grade 5 cap screws in everyday MRO tasks.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 5/16" | 3/4" | 1/16" | 100 |
373504
|
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|
Package Weight: 0.7 lbs
|
||||||
| 1/4" | 5/16" | 3/4" | 1/16" | 200 |
3735041
|
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|
Package Weight: 1.4 lbs
|
||||||
| 1/4" | 5/16" | 3/4" | 1/16" | 500 |
3735042
|
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|
Package Weight: 3.5 lbs
|
||||||
| 5/16" | 3/8" | 7/8" | 5/64" | 100 |
373505
|
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|
Package Weight: 1.1 lbs
|
||||||
| 5/16" | 3/8" | 7/8" | 5/64" | 200 |
3735051
|
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|
Package Weight: 2.2 lbs
|
||||||
| 5/16" | 3/8" | 7/8" | 5/64" | 500 |
3735052
|
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|
Package Weight: 5.5 lbs
|
||||||
| 3/8" | 7/16" | 1" | 5/64" | 50 |
373506
|
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|
Package Weight: 0.9 lbs
|
||||||
| 3/8" | 7/16" | 1" | 5/64" | 100 |
3735061
|
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|
Package Weight: 1.8 lbs
|
||||||
| 7/16" | 1/2" | 1-1/4" | 5/64" | 50 |
373507
|
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|
Package Weight: 1.1 lbs
|
||||||
| 7/16" | 1/2" | 1-1/4" | 5/64" | 100 |
3735071
|
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|
Package Weight: 2.2 lbs
|
||||||
| 1/2" | 9/16" | 1-3/8" | 7/64" | 50 |
373508
|
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|
||||||
| 1/2" | 9/16" | 1-3/8" | 7/64" | 100 |
3735081
|
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|
Package Weight: 4 lbs
|
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Grade 5 (SAE) Flat Washers - Zinc Plated
Use these zinc‑plated Grade 5 (SAE) washers to distribute load and prevent surface damage in automotive or machinery assemblies. A burr‑free surface ensures a secure fit, while the zinc finish offers moderate corrosion protection. Pair with Grade 5 bolts for reliable performance under standard MRO conditions.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 9/32" | 5/8" | 1/16" | 100 |
373604
|
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|
Package Weight: 0.5 lbs
|
||||||
| 1/4" | 9/32" | 5/8" | 1/16" | 200 |
3736041
|
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|
Package Weight: 1 lbs
|
||||||
| 1/4" | 9/32" | 5/8" | 1/16" | 500 |
3736042
|
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|
Package Weight: 2.5 lbs
|
||||||
| 5/16" | 11/32" | 11/16" | 1/16" | 100 |
373605
|
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|
Package Weight: 0.6 lbs
|
||||||
| 5/16" | 11/32" | 11/16" | 1/16" | 200 |
3736051
|
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|
Package Weight: 1.2 lbs
|
||||||
| 5/16" | 11/32" | 11/16" | 1/16" | 500 |
3736052
|
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|
Package Weight: 3 lbs
|
||||||
| 3/8" | 13/32" | 13/16" | 1/16" | 100 |
373606
|
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|
Package Weight: 0.8 lbs
|
||||||
| 3/8" | 13/32" | 13/16" | 1/16" | 200 |
3736061
|
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|
Package Weight: 1.6 lbs
|
||||||
| 7/16" | 15/32" | 15/16" | 1/16" | 50 |
373607
|
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|
Package Weight: 0.5 lbs
|
||||||
| 7/16" | 15/32" | 15/16" | 1/16" | 100 |
3736071
|
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|
Package Weight: 1 lbs
|
||||||
| 1/2" | 17/32" | 1-1/16" | 3/32" | 50 |
373608
|
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|
Package Weight: 0.9 lbs
|
||||||
| 1/2" | 17/32" | 1-1/16" | 3/32" | 100 |
3736081
|
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|
Package Weight: 1.8 lbs
|
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Grade 5 (SAE) Flat Washers - Plain Finish
Ideal for everyday fastening needs, these plain‑finish Grade 5 (SAE) washers help maintain clamp load and reduce friction. Their burr‑free design prevents scratching, making them well‑suited for automotive or general machinery. Combine with Grade 5 bolts for consistent tension in moderate environments.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| #8 | 3/16" | 7/16" | 3/64" | 50 |
3733602
|
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|
|
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Grade 5 Flat Washers
Built for standard‑duty tasks, these Grade 5 flat washers spread bolt load evenly to minimize surface wear. A plain finish works well indoors or in low‑corrosion settings, while high‑strength steel prevents distortion under moderate stress. Pair with Grade 5 fasteners for stable, secure connections.
| Bolt Size | Inside Diameter | Outside Diameter | Package Qty | Item # |
Price
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|---|---|---|---|---|---|
| 1/4" | 5/16" | 47/64" | 100 |
377504
|
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|
|
|||||
| 5/16" | 3/8" | 7/8" | 100 |
377505
|
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|
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| 3/8" | 7/16" | 1" | 100 |
377506
|
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|
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| 7/16" | 1/2" | 1-1/4" | 100 |
377507
|
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| 1/2" | 9/16" | 1-3/8" | 100 |
377508
|
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| 9/16" | 5/8" | 1-15/32" | 50 |
377509
|
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|
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|||||
| 5/8" | 11/16" | 1-3/4" | 50 |
377510
|
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| 3/4" | 13/16" | 2" | 50 |
377512
|
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|||||
| 7/8" | 15/16" | 2-1/4" | 50 |
377514
|
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| 1" | 1-1/16" | 2-1/2" | 50 |
377516
|
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|
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L9 (USS) Flat Washers
Offering the strongest off‑the‑shelf fastening system, these L9® (USS) washers ensure superior clamp loads in high‑stress conditions. Zinc yellow plating fights corrosion, while the robust design handles severe service in heavy machinery or trucking. Use with L9® bolts for maximum holding strength and longevity.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 9/32" | 3/4" | 1/16" | 100 |
379054
|
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|
Package Weight: 0.8 lbs
|
||||||
| 5/16" | 11/32" | 7/8" | 3/32" | 100 |
379055
|
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|
Package Weight: 1.2 lbs
|
||||||
| 3/8" | 13/32" | 1" | 3/32" | 100 |
379056
|
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|
Package Weight: 1.6 lbs
|
||||||
| 7/16" | 15/32" | 1-1/4" | 7/64" | 50 |
379057
|
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|
Package Weight: 1.4 lbs
|
||||||
| 1/2" | 17/32" | 1-3/8" | 9/64" | 50 |
379058
|
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|
Package Weight: 2.2 lbs
|
||||||
| 5/8" | 21/32" | 1-3/4" | 3/16" | 25 |
379060
|
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|
Package Weight: 2.1 lbs
|
||||||
| 3/4" | 25/32" | 2" | 3/16" | 25 |
379062
|
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|
Package Weight: 2.6 lbs
|
||||||
| 7/8" | 15/16" | 2-1/4" | 3/16" | 10 |
379064
|
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|
Package Weight: 1.4 lbs
|
||||||
| 1" | 1-1/16" | 2-1/2" | 3/16" | 10 |
379066
|
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|
|
||||||
L9 (SAE) Flat Washers
Engineered for extreme stress applications, these L9® (SAE) washers feature RoHS‑compliant zinc yellow plating and the highest mechanical strength in off‑the‑shelf fastening. They maximize clamp load in heavy equipment or severe service environments. Pair with L9® bolts for unrivaled holding power.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 9/32" | 5/8" | 1/16" | 100 |
379004
|
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|
Package Weight: 0.5 lbs
|
||||||
| 5/16" | 11/32" | 11/16" | 1/16" | 100 |
379005
|
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|
Package Weight: 0.5 lbs
|
||||||
| 3/8" | 13/32" | 13/16" | 3/32" | 100 |
379006
|
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|
Package Weight: 1 lbs
|
||||||
| 7/16" | 15/32" | 15/16" | 3/32" | 50 |
379007
|
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|
Package Weight: 0.7 lbs
|
||||||
| 1/2" | 17/32" | 1-1/16" | 3/32" | 50 |
379008
|
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|
Package Weight: 0.9 lbs
|
||||||
| 9/16" | 19/32" | 1-3/16" | 3/32" | 25 |
379009
|
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|
Package Weight: 0.5 lbs
|
||||||
| 5/8" | 21/32" | 1-5/16" | 11/64" | 25 |
379010
|
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|
Package Weight: 1.1 lbs
|
||||||
| 3/4" | 13/16" | 1-1/2" | 11/64" | 25 |
379012
|
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|
Package Weight: 1.3 lbs
|
||||||
| 7/8" | 15/16" | 1-3/4" | 11/64" | 10 |
379014
|
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|
Package Weight: 0.7 lbs
|
||||||
| 1" | 1-1/16" | 2" | 11/64" | 10 |
379016
|
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|
|
||||||
Metric Alloy Steel Flat Washers
Suitable for use with Class 10.9 cap screws, these alloy steel metric washers resist bending to secure full clamp force. Zinc plating offers moderate corrosion protection, while Rc 38–45 hardness ensures durability. Ideal for industrial assembly lines needing reliable fastener performance.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| M6 | 6.4 mm | 12.5 mm | 1.6 mm | 100 |
453706
|
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|
|
||||||
| M8 | 8.4 mm | 17 mm | 1.6 mm | 50 |
453708
|
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|
|
||||||
| M10 | 10.5 mm | 21 mm | 2 mm | 50 |
453710
|
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|
|
||||||
| M12 | 13 mm | 24 mm | 2.5 mm | 50 |
453712
|
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|
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||||||
| M14 | 15 mm | 28 mm | 2.5 mm | 25 |
453714
|
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|
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||||||
| M16 | 17 mm | 30 mm | 3 mm | 25 |
453716
|
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|
|
||||||
| M18 | 19 mm | 34 mm | 3 mm | 25 |
453718
|
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|
|
||||||
| M20 | 21 mm | 37 mm | 3 mm | 25 |
453720
|
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|
|
||||||
| M22 | 23 mm | 39 mm | 3 mm | 10 |
453722
|
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|
|
||||||
| M24 | 25 mm | 44 mm | 4 mm | 10 |
453724
|
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|
||||||
Metric Zinc Plated Flat Washers
Ideal for moderate load distribution, these zinc‑plated metric washers help protect surfaces from wear. The corrosion‑resistant finish suits automotive, equipment repair, or general industrial needs. Apply the correct torque with matching metric bolts for reliable clamping in everyday MRO applications.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| M4 | 4.3 mm | 9 mm | 0.8 mm | 100 |
453504
|
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|
|
||||||
| M5 | 5.3 mm | 10 mm | 1 mm | 50 |
453505
|
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|
|
||||||
| M6 | 6.4 mm | 12.5 mm | 1.6 mm | 50 |
453506
|
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|
|
||||||
| M7 | 7.4 mm | 14 mm | 1.6 mm | 50 |
453507
|
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|
|
||||||
| M8 | 8.4 mm | 17 mm | 1.6 mm | 50 |
453508
|
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|
|
||||||
| M10 | 10.5 mm | 20 mm | 2 mm | 50 |
453510
|
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|
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||||||
| M12 | 13 mm | 24 mm | 2.5 mm | 50 |
453512
|
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|
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||||||
| M14 | 15 mm | 28 mm | 2.5 mm | 25 |
453514
|
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|
|
||||||
| M16 | 17 mm | 30 mm | 3 mm | 25 |
453516
|
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|
|
||||||
| M18 | 19 mm | 34 mm | 3 mm | 25 |
453518
|
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|
|
||||||
| M20 | 21 mm | 37 mm | 3 mm | 25 |
453520
|
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|
|
||||||
| M24 | 25 mm | 44 mm | 4 mm | 10 |
453524
|
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|
|
||||||
Metric Plain Finish Flat Washers
These plain‑finish Class 8 metric washers distribute load evenly under bolt heads or nuts, improving joint reliability. The steel construction resists deformation under typical MRO loads. Use them with Class 8 metric bolts for secure, consistent clamp force in machinery or automotive assemblies.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| M4 | 4.3 mm | 9 mm | 0.8 mm | 50 |
4533504
|
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|
|
||||||
| M5 | 5.3 mm | 10 mm | 1 mm | 50 |
4533505
|
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|
|
||||||
| M6 | 6.4 mm | 12.5 mm | 1.6 mm | 50 |
4533506
|
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|
|
||||||
| M8 | 8.4 mm | 17 mm | 1.6 mm | 50 |
4533508
|
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|
|
||||||
| M10 | 10.5 mm | 21 mm | 2 mm | 50 |
4533510
|
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|
|
||||||
Medium Carbon Steel Flat Washers
These medium carbon steel washers, designed for use with Class 10.9 screws, minimize surface damage by distributing load effectively. Zinc plating offers moderate corrosion protection, while the robust build resists dishing in heavy‑duty MRO or machinery applications. Install with proper torque for best results.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| M6 | 6.4 mm | 12.5 mm | 1.6 mm | 50 |
453806
|
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|
Package Weight: 0.1 lbs
|
||||||
| M8 | 8.4 mm | 17 mm | 1.6 mm | 50 |
453808
|
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|
Package Weight: 0.2 lbs
|
||||||
| M10 | 10.5 mm | 21 mm | 2 mm | 50 |
453810
|
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|
Package Weight: 0.4 lbs
|
||||||
| M12 | 13 mm | 24 mm | 2.5 mm | 25 |
453812
|
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|
Package Weight: 0.4 lbs
|
||||||
| M14 | 15 mm | 28 mm | 2.5 mm | 25 |
453814
|
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|
Package Weight: 0.5 lbs
|
||||||
| M16 | 17 mm | 30 mm | 3 mm | 25 |
453816
|
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|
Package Weight: 0.6 lbs
|
||||||
| M18 | 19 mm | 34 mm | 3 mm | 25 |
453818
|
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|
Package Weight: 0.7 lbs
|
||||||
| M20 | 21 mm | 37 mm | 3 mm | 25 |
453820
|
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|
Package Weight: 0.9 lbs
|
||||||
| M22 | 23 mm | 39 mm | 3 mm | 10 |
453822
|
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|
Package Weight: 0.4 lbs
|
||||||
| M24 | 25 mm | 44 mm | 4 mm | 10 |
453824
|
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|
Package Weight: 0.7 lbs
|
||||||
Grade 2 Galvanized Flat Washers
Hot‑dip galvanized for excellent corrosion protection, these Grade 2 washers meet ASTM F844 for A307 fasteners. Ideal in construction or agricultural machinery, they ensure broad load distribution under moderate stress. Use them outdoors or in wet conditions where rust resistance is paramount.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 5/16" | 3/4" | 1/16" | 100 |
372904
|
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|
Package Weight: 0.6 lbs
|
||||||
| 5/16" | 3/8" | 7/8" | 5/64" | 100 |
372905
|
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|
Package Weight: 1.1 lbs
|
||||||
| 3/8" | 7/16" | 1" | 5/64" | 100 |
372906
|
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|
Package Weight: 1.3 lbs
|
||||||
| 1/2" | 9/16" | 1-3/8" | 7/64" | 50 |
372908
|
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|
Package Weight: 1.6 lbs
|
||||||
| 5/8" | 11/16" | 1-3/4" | 9/64" | 25 |
372910
|
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|
Package Weight: 1.8 lbs
|
||||||
| 3/4" | 13/16" | 2" | 5/32" | 25 |
372912
|
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|
Package Weight: 2.7 lbs
|
||||||
Nylon Flat Washers
Non‑conductive and lightweight, these 6/6 nylon washers reduce friction, absorb vibration, and resist oils or chemicals up to 185°F. They’re ideal for electrical or corrosive environments where metal washers could fail. For secure fastening, combine with appropriate bolts and moderate torque in MRO assemblies.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 0.257" | 1/2" | 0.032" | 100 |
375208
|
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|
Package Weight: 0.1 lbs
|
||||||
| 1/4" | 0.257" | 1/2" | 0.062" | 100 |
375209
|
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|
Package Weight: 0.1 lbs
|
||||||
| 5/16" | 0.317" | 1/2" | 0.032" | 50 |
375210
|
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|
Package Weight: 0.1 lbs
|
||||||
| 5/16" | 0.317" | 1/2" | 0.062" | 50 |
375211
|
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|
Package Weight: 0.1 lbs
|
||||||
| 3/8" | 0.38" | 5/8" | 0.032" | 50 |
375212
|
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|
|
||||||
| 3/8" | 0.38" | 5/8" | 0.062" | 50 |
375213
|
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|
|
||||||
| 7/16" | 0.443" | 3/4" | 0.032" | 50 |
375214
|
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|
Package Weight: 0.1 lbs
|
||||||
| 7/16" | 0.443" | 3/4" | 0.062" | 50 |
375215
|
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|
Package Weight: 0.1 lbs
|
||||||
| 1/2" | 0.505" | 3/4" | 0.032" | 50 |
375216
|
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|
|
||||||
| 1/2" | 0.505" | 3/4" | 0.062" | 50 |
375217
|
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|
|
||||||
| #4 | 0.115" | 1/4" | 0.032" | 100 |
375200
|
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|
|
||||||
| #4 | 0.115" | 1/4" | 0.062" | 100 |
375201
|
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|
|
||||||
Silicon Bronze Flat Washers
Silicon bronze provides strong corrosion resistance, making these washers perfect for marine, electrical, or chemical environments. Alloy 651’s non‑magnetic properties help in power generation, distribution, or sea‑exposed platforms. Install them where conductivity and long‑term durability matter most.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 1/4" | 0.281" | 0.625" | 0.05" | 50 |
373444
|
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|
Package Weight: 0.2 lbs
|
||||||
| 5/16" | 0.344" | 0.75" | 0.062" | 50 |
373445
|
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|
Package Weight: 0.3 lbs
|
||||||
| 3/8" | 0.406" | 0.875" | 0.062" | 25 |
373446
|
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|
Package Weight: 0.3 lbs
|
||||||
| 1/2" | 0.563" | 1.25" | 0.078" | 25 |
373448
|
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|
Package Weight: 0.7 lbs
|
||||||
Brass Flat Washers
Perfect for decorative or electrical projects, these brass washers resist corrosion and minimize friction under moderate load. Their smooth finish suits plumbing fixtures or ornamental hardware, while inherent conductivity makes them useful in certain electrical installations. Employ where aesthetics and function align.
| Bolt Size | Inside Diameter | Outside Diameter | Package Qty | Item # |
Price
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|---|---|---|---|---|---|
| 7/16" | 0.495" - 0.505" | 1.115" - 1.135" | 25 |
373407
|
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|
|
|||||
| 1/2" | 0.557" - 0.577" | 1.243" - 1.28" | 25 |
373408
|
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|
|
|||||
| 5/8" | 0.678" - 0.698" | 1.49" - 1.51" | 10 |
373410
|
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|
|
|||||
| 3/4" | 0.802" - 0.822" | 1.865" - 1.885" | 10 |
373412
|
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|
|
|||||
| #4 | 0.115" - 0.13" | 0.271" - 0.291" | 100 |
373400
|
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|
|
|||||
| #6L | 0.142" - 0.156" | 0.368" - 0.383" | 100 |
373421
|
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|
|
|||||
| #6S | 0.142" - 0.156" | 0.305" - 0.318" | 100 |
373401
|
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|
|
|||||
| #8L | 0.167" - 0.181" | 0.43" - 0.449" | 100 |
373422
|
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|
|
|||||
| #8S | 0.167" - 0.181" | 0.368" - 0.383" | 100 |
373402
|
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|
|
|||||
| #10L | 0.195" - 0.21" | 0.49" - 0.51" | 100 |
373423
|
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|
|
|||||
| #10S | 0.195" - 0.21" | 0.43" - 0.449" | 100 |
373403
|
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|
|
|||||
| #12L | 0.218" - 0.238" | 0.552" - 0.572" | 100 |
373427
|
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|
|
|||||
Isoplastic Flat Washers
Made of fiberglass‑reinforced thermoplastic polyurethane, these isoplastic washers resist impact, corrosion, and extreme temperatures up to 366°F. Non‑conductive properties suit electrical equipment, while high tensile strength ensures durability in harsh conditions. Use for a lighter, rust‑free alternative to metal.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 3/8" | 0.39" | 3/4" | 0.06" | 25 |
375313
|
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|
|
||||||
| 1/2" | 0.531" | 1" | 0.06" | 25 |
375317
|
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|
||||||
F436 Galvanized Flat Washers
Hot‑dip galvanized for rust prevention, these F436 washers meet ASTM F436 standards for structural fasteners like A325 bolts. They provide superior corrosion protection in outdoor or demanding conditions, making them perfect for bridges, building frames, or heavy construction equipment.
| Bolt Size | Inside Diameter | Outside Diameter | Thickness | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|
| 5/8" | 11/16" | 1-5/16" | 0.177" | 50 |
375610
|
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|
Package Weight: 1.7 lbs
|
||||||
| 3/4" | 13/16" | 1-15/32" | 0.177" | 10 |
375612
|
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|
Package Weight: 0.4 lbs
|
||||||
| 7/8" | 15/16" | 1-3/4" | 0.177" | 10 |
375614
|
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|
Package Weight: 0.7 lbs
|
||||||
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Pkg Qty: 25
Featured Products:
- Grade 5 USS Zinc-Plated Flat Washer: Made from carbon steel with a zinc-plated finish. Ideal for use with Grade 5 Hex Head Cap Screws.
- Grade 8 SAE Yellow Zinc Alloy Steel Flat Washer: Features enhanced thickness for added resistance to dishing and distortion, close-fitting inner diameter for better load-bearing capacity and zinc yellow plating with Hexavalent Chromate for superior corrosion protection. Best paired with Grade 8 high head cap screws.
- Nylon Flat Washer: Made from natural white 6/6 nylon. They can withstand temperatures up to 185°F, reduce friction and wear between mating parts, and resist chemicals, greases and oils.
What is the difference between a flat washer and a SAE washer?
Flat washers are general-purpose washers used to distribute load, while SAE washers adhere to specific Society of Automotive Engineers standards regarding dimensions and materials, ensuring uniformity.
What temperature can Nylon Flat Washers withstand?
Nylon flat washers can perform effectively at temperatures up to 185°F, making them suitable for many industrial applications.
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