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General Purpose USS & SAE Washers

When bolts walk, joints loosen and parts get chewed up. These USS and SAE flat washers spread load, protect surfaces and help you hold clamp under torque. Match the OD to your hole and the grade to your fastener: Grade 2-5 for everyday work, Grade 8 and L9 for high-stress. Go galvanized or Armor Coat for corrosion, nylon or isoplastic for non-conductive.

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304 results
KM-USA Class 10 Flat Washers
KM-USA Class 10 Flat Washers
KM-USA Class 10 flat washers are carbon steel, yellow zinc plated to resist corrosion and meet ISO 7089/DIN 125 standards. Designed for metric 10.9 fastening systems, they provide consistent bearing area and load distribution, helping protect assemblies during installation. Made in the U.S.A.
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M6
6.4 mm
11.5 mm
1.5 mm
100
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M8
8.4 mm
15.5 mm
1.5 mm
50
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M10
10.5 mm
19.4 mm
2 mm
50
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M12
13 mm
23.4 mm
2.5 mm
50
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M14
15 mm
27.4 mm
2.5 mm
25
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M16
17 mm
29.4 mm
3.1 mm
25
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M18
19 mm
33.3 mm
3.1 mm
25
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M20
21 mm
36.3 mm
3.1 mm
25
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M22
23 mm
38.3 mm
3.1 mm
10
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M24
25 mm
43.3 mm
3.8 mm
10
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Grade 8 (USS) Flat Washers - Yellow Zinc Plated
Grade 8 (USS) Flat Washers - Yellow Zinc Plated
Grade 8 USS flat washers made from alloy steel finished in zinc yellow with hexavalent chromate plating. Close-fitting ID and enhanced thickness reduce dishing and improve load bearing, providing more uniform clamp load and a smoother bearing surface for assemblies.
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1/4"
9/32"
3/4"
5/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
100
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1/4"
9/32"
3/4"
5/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
200
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1/4"
9/32"
3/4"
5/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
500
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5/16"
11/32"
7/8"
3/32"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
100
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5/16"
11/32"
7/8"
3/32"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
200
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5/16"
11/32"
7/8"
3/32"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
500
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3/8"
13/32"
1"
3/32"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
100
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3/8"
13/32"
1"
3/32"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
200
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7/16"
15/32"
1-1/4"
3/32"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
50
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7/16"
15/32"
1-1/4"
3/32"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
100
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1/2"
17/32"
1-3/8"
1/8"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
50
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1/2"
17/32"
1-3/8"
1/8"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
100
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Grade 8 (SAE) Flat Washers - Yellow Zinc Plated
Grade 8 (SAE) Flat Washers - Yellow Zinc Plated
Grade 8 SAE flat washers made from alloy steel finished in zinc yellow with hexavalent chromate plating. Close-fitting ID and enhanced thickness resist dishing and improve load bearing, providing more uniform clamp load for assemblies. Exceeds SAE specifications.
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1/4"
9/32"
5/8"
5/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
100
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1/4"
9/32"
5/8"
5/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
200
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1/4"
9/32"
5/8"
5/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
500
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5/16"
11/32"
11/16"
3/32"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
100
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5/16"
11/32"
11/16"
3/32"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
200
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5/16"
11/32"
11/16"
3/32"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
500
Log in to view price
3/8"
13/32"
13/16"
3/32"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
100
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3/8"
13/32"
13/16"
3/32"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
200
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7/16"
15/32"
59/64"
3/32"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
100
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7/16"
15/32"
59/64"
3/32"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
200
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1/2"
17/32"
1-1/16"
7/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
50
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1/2"
17/32"
1-1/16"
7/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
100
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Grade 8 (USS) Extra Thick Flat Washers - Yellow Zinc Plated
Grade 8 (USS) Extra Thick Flat Washers - Yellow Zinc Plated
Grade 8 USS extra thick flat washers made from alloy steel finished in zinc yellow with hexavalent chromate plating. Thru-hardened for use with Grade 8 bolts, these USS-pattern washers provide increased bearing area and improved load distribution, helping reduce bolt pull-through in assemblies.
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1/4"
5/16"
3/4"
7/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
50
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5/16"
3/8"
7/8"
1/8"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
50
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3/8"
7/16"
1"
1/8"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
50
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7/16"
1/2"
1-1/4"
9/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
25
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1/2"
9/16"
1-3/8"
11/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
25
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9/16"
5/8"
1-1/2"
11/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
25
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5/8"
11/16"
1-3/4"
3/16"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
25
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3/4"
13/16"
2"
3/16"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
10
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7/8"
15/16"
2-1/4"
1/4"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
10
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1"
1-1/16"
2-1/2"
1/4"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
10
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Grade 8 (SAE) Extra Thick Flat Washers - Yellow Zinc Plated
Grade 8 (SAE) Extra Thick Flat Washers - Yellow Zinc Plated
Grade 8 extra-thick SAE flat washers manufactured from alloy steel with yellow zinc plating and hexavalent chromate finish. Thru-hardened for use with Grade 8 bolts, the heavier thickness provides improved load distribution and resists corrosion. Suitable for heavy-duty fastening applications.
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1/4"
9/32"
5/8"
7/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
50
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5/16"
11/32"
11/16"
1/8"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
50
Log in to view price
3/8"
13/32"
13/16"
1/8"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
50
Log in to view price
7/16"
15/32"
59/64"
9/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
25
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1/2"
17/32"
1-1/16"
11/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
25
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9/16"
21/32"
1-3/16"
11/64"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
25
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5/8"
11/16"
1-5/16"
3/16"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
25
Log in to view price
3/4"
13/16"
1-15/32"
3/16"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
10
Log in to view price
7/8"
15/16"
1-3/4"
1/4"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
10
Log in to view price
1"
1-1/16"
2"
1/4"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
10
Log in to view price
1-1/8"
1-1/4"
2-1/4"
1/4"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
5
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1-1/4"
1-3/8"
2-1/2"
1/4"
Alloy Steel
Zinc Yellow w/ Hexavalent Chromate
5
Log in to view price
Grade 8 (USS) Flat Washers - Plain Finish
Grade 8 (USS) Flat Washers - Plain Finish
Grade 8 USS flat washers made from alloy steel with a plain finish. These USS-pattern washers resist dishing and distortion and are intended for use with Grade 8 fasteners; varying diameters and thicknesses provide matching bearing surface and load distribution for assemblies.
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1/4"
5/16"
3/4"
1/16"
Alloy Steel
Plain
100
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5/16"
3/8"
7/8"
5/64"
Alloy Steel
Plain
100
Log in to view price
3/8"
7/16"
1"
5/64"
Alloy Steel
Plain
100
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7/16"
1/2"
1-1/4"
5/64"
Alloy Steel
Plain
100
Log in to view price
1/2"
9/16"
1-3/8"
7/64"
Alloy Steel
Plain
50
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9/16"
5/8"
1-1/2"
7/64"
Alloy Steel
Plain
50
Log in to view price
5/8"
11/16"
1-3/4"
1/8"
Alloy Steel
Plain
50
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3/4"
13/16"
2"
1/8"
Alloy Steel
Plain
10
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7/8"
15/16"
2-1/4"
5/32"
Alloy Steel
Plain
10
Log in to view price
1"
1-1/16"
2-1/2"
5/32"
Alloy Steel
Plain
10
Log in to view price
1-1/8"
1-1/4"
2-3/4"
5/32"
Alloy Steel
Plain
5
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1-1/4"
1-3/8"
3"
5/32"
Alloy Steel
Plain
5
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Grade 8 (SAE) Flat Washers - Plain Finish
Grade 8 (SAE) Flat Washers - Plain Finish
Grade 8 SAE plain finish alloy steel flat washers designed to provide load distribution and a smooth bearing surface for controlled torquing. Enhanced thickness reduces dishing and distortion and the close-fitting inside diameter improves load bearing capability. Suitable for heavy-duty fastening.
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1/4"
9/32"
5/8"
5/64"
Alloy Steel
Plain
100
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5/16"
11/32"
11/16"
3/32"
Alloy Steel
Plain
100
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3/8"
13/32"
13/16"
3/32"
Alloy Steel
Plain
100
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7/16"
15/32"
59/64"
3/32"
Alloy Steel
Plain
100
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1/2"
17/32"
1-1/16"
7/64"
Alloy Steel
Plain
50
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9/16"
19/32"
1-3/16"
7/64"
Alloy Steel
Plain
50
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5/8"
11/16"
1-5/16"
1/8"
Alloy Steel
Plain
50
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3/4"
13/16"
1-15/32"
9/64"
Alloy Steel
Plain
25
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7/8"
15/16"
1-3/4"
9/64"
Alloy Steel
Plain
10
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1"
1-1/8"
2"
9/64"
Alloy Steel
Plain
10
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1-1/8"
1-1/4"
2-1/4"
9/64"
Alloy Steel
Plain
5
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1-1/4"
1-3/8"
2-1/2"
5/32"
Alloy Steel
Plain
5
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Grade 8 (USS) Flat Washers - Armor Coat™
Grade 8 (USS) Flat Washers - Armor Coat™
Grade 8 USS Armor Coat™ flat washers in alloy steel with a silver Armor Coat finish. High tensile strength and exceptional corrosion resistance (passes 1,000-hour salt spray) provides enhanced durability and long life in demanding, harsh-environment assemblies.
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1/4"
5/16"
3/4"
1/16"
Alloy Steel
Armor Coat
100
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5/16"
3/8"
7/8"
1/16"
Alloy Steel
Armor Coat
100
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3/8"
7/16"
1"
1/16"
Alloy Steel
Armor Coat
100
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7/16"
1/2"
1-1/4"
1/16"
Alloy Steel
Armor Coat
100
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1/2"
9/16"
1-3/8"
7/64"
Alloy Steel
Armor Coat
50
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5/8"
21/32"
1-3/4"
7/64"
Alloy Steel
Armor Coat
25
Log in to view price
3/4"
13/16"
2"
1/8"
Alloy Steel
Armor Coat
25
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Grade 8 (SAE) Flat Washers - Armor Coat™
Grade 8 (SAE) Flat Washers - Armor Coat™
Grade 8 SAE flat washers made from alloy steel with an Armor Coat finish. These high‑strength washers offer Grade 8 tensile performance and superior corrosion resistance. Armor Coat resists salt spray and improves longevity compared with standard platings. Suitable for demanding assemblies.
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1/4"
9/32"
5/8"
1/16"
Alloy Steel
Armor Coat
100
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5/16"
21/64"
11/16"
1/16"
Alloy Steel
Armor Coat
100
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3/8"
25/64"
13/16"
1/16"
Alloy Steel
Armor Coat
100
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7/16"
15/32"
59/64"
1/16"
Alloy Steel
Armor Coat
100
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1/2"
17/32"
1-1/16"
7/64"
Alloy Steel
Armor Coat
50
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5/8"
45/64"
1-5/16"
7/64"
Alloy Steel
Armor Coat
25
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3/4"
53/64"
1-15/32"
1/8"
Alloy Steel
Armor Coat
25
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Grade 5 (USS) Flat Washers - Zinc Plated
Grade 5 (USS) Flat Washers - Zinc Plated
Grade 5 USS flat washers made from carbon steel with a zinc-plated finish and smooth, burr-free surfaces. USS thread pattern provides increased bearing area and corrosion resistance from plating. Suited for general assemblies with Grade 5 fasteners.
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#10
1/4"
9/16"
3/64"
Carbon Steel
Zinc Plated
100
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#10
1/4"
9/16"
3/64"
Carbon Steel
Zinc Plated
200
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#12
9/32"
5/8"
1/16"
Carbon Steel
Zinc Plated
100
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#12
9/32"
5/8"
1/16"
Carbon Steel
Zinc Plated
200
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1/4"
5/16"
3/4"
1/16"
Carbon Steel
Zinc Plated
100
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1/4"
5/16"
3/4"
1/16"
Carbon Steel
Zinc Plated
200
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1/4"
5/16"
3/4"
1/16"
Carbon Steel
Zinc Plated
500
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5/16"
3/8"
7/8"
5/64"
Carbon Steel
Zinc Plated
100
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5/16"
3/8"
7/8"
5/64"
Carbon Steel
Zinc Plated
200
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5/16"
3/8"
7/8"
5/64"
Carbon Steel
Zinc Plated
500
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3/8"
7/16"
1"
5/64"
Carbon Steel
Zinc Plated
50
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3/8"
7/16"
1"
5/64"
Carbon Steel
Zinc Plated
100
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Grade 5 (SAE) Flat Washers - Zinc Plated
Grade 5 (SAE) Flat Washers - Zinc Plated
Grade 5 SAE flat washers made from carbon or alloy steel with a zinc-plated finish. Smooth, burr-free surfaces resist corrosion and provide consistent bearing under fasteners. Available in standard SAE patterns for general assembly and repair applications.
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#4
1/8"
5/16"
1/32"
Carbon Steel
Zinc Plated
100
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#4
1/8"
5/16"
1/32"
Carbon Steel
Zinc Plated
200
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#6
5/32"
3/8"
3/64"
Carbon Steel
Zinc Plated
100
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#6
5/32"
3/8"
3/64"
Carbon Steel
Zinc Plated
200
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#8
3/16"
7/16"
3/64"
Carbon Steel
Zinc Plated
100
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#8
3/16"
7/16"
3/64"
Carbon Steel
Zinc Plated
200
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#10
7/32"
1/2"
1/16"
Carbon Steel
Zinc Plated
100
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#10
7/32"
1/2"
1/16"
Carbon Steel
Zinc Plated
200
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#12
1/4"
9/16"
3/64"
Carbon Steel
Zinc Plated
100
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#12
1/4"
9/16"
3/64"
Carbon Steel
Zinc Plated
200
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1/4"
9/32"
5/8"
1/16"
Carbon Steel
Zinc Plated
100
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1/4"
9/32"
5/8"
1/16"
Carbon Steel
Zinc Plated
200
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Grade 5 (SAE) Flat Washers - Plain Finish
Grade 5 (SAE) Flat Washers - Plain Finish
Grade 5 SAE flat washer made from carbon steel with a plain silver finish and smooth, burr-free surfaces. Thin-profile design with SAE pattern and #8 bore; provides consistent load distribution and resists deformation for general fastening applications.
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#8
3/16"
7/16"
3/64"
Carbon Steel
Plain
50
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Grade 5 Flat Washers
Grade 5 Flat Washers
Grade 5 plain steel flat washers in USS profile for a range of bolt sizes. High strength construction helps prevent dishing and distortion and is intended for use with Grade 5/Grade 8 fasteners. Plain finish for applications where zinc plating is unnecessary.
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1/4"
5/16"
47/64"
Steel
Plain
100
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5/16"
3/8"
7/8"
Steel
Plain
100
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3/8"
7/16"
1"
Steel
Plain
100
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7/16"
1/2"
1-1/4"
Steel
Plain
100
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1/2"
9/16"
1-3/8"
Steel
Plain
100
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9/16"
5/8"
1-15/32"
Steel
Plain
50
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5/8"
11/16"
1-3/4"
Steel
Plain
50
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3/4"
13/16"
2"
Steel
Plain
50
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7/8"
15/16"
2-1/4"
Steel
Plain
50
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1"
1-1/16"
2-1/2"
Steel
Plain
50
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L9 (USS) Flat Washers
L9 (USS) Flat Washers
L9 USS flat washers made from alloy steel with a zinc yellow trivalent finish. USS profile delivers higher clamp loads and superior holding for high-stress applications. RoHS-compliant L9 grade provides elevated mechanical strength and improved corrosion resistance.
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1/4"
9/32"
3/4"
1/16"
Alloy Steel
Zinc Yellow Trivalent
100
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5/16"
11/32"
7/8"
3/32"
Alloy Steel
Zinc Yellow Trivalent
100
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3/8"
13/32"
1"
3/32"
Alloy Steel
Zinc Yellow Trivalent
100
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7/16"
15/32"
1-1/4"
7/64"
Alloy Steel
Zinc Yellow Trivalent
50
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1/2"
17/32"
1-3/8"
9/64"
Alloy Steel
Zinc Yellow Trivalent
50
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5/8"
21/32"
1-3/4"
3/16"
Alloy Steel
Zinc Yellow Trivalent
25
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3/4"
25/32"
2"
3/16"
Alloy Steel
Zinc Yellow Trivalent
25
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7/8"
15/16"
2-1/4"
3/16"
Alloy Steel
Zinc Yellow Trivalent
10
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1"
1-1/16"
2-1/2"
3/16"
Alloy Steel
Zinc Yellow Trivalent
10
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L9 (SAE) Flat Washers
L9 (SAE) Flat Washers
L9 SAE flat washers made from alloy steel with a zinc yellow trivalent finish. Engineered for the L9 fastening system to deliver high mechanical strength and superior clamp loads, these SAE-pattern washers provide consistent holding for demanding, severe-service fastening applications.
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1/4"
9/32"
5/8"
1/16"
Alloy Steel
Zinc Yellow Trivalent
100
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5/16"
11/32"
11/16"
1/16"
Alloy Steel
Zinc Yellow Trivalent
100
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3/8"
13/32"
13/16"
3/32"
Alloy Steel
Zinc Yellow Trivalent
100
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7/16"
15/32"
15/16"
3/32"
Alloy Steel
Zinc Yellow Trivalent
50
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1/2"
17/32"
1-1/16"
3/32"
Alloy Steel
Zinc Yellow Trivalent
50
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9/16"
19/32"
1-3/16"
3/32"
Alloy Steel
Zinc Yellow Trivalent
25
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5/8"
21/32"
1-5/16"
11/64"
Alloy Steel
Zinc Yellow Trivalent
25
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3/4"
13/16"
1-1/2"
11/64"
Alloy Steel
Zinc Yellow Trivalent
25
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7/8"
15/16"
1-3/4"
11/64"
Alloy Steel
Zinc Yellow Trivalent
10
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1"
1-1/16"
2"
11/64"
Alloy Steel
Zinc Yellow Trivalent
10
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Metric Alloy Steel Flat Washers
Metric Alloy Steel Flat Washers
Metric alloy steel flat washers made from medium carbon alloy steel with zinc plating and an RC 38 to 45 hardness rating (180,000 psi). Engineered to resist bending and distortion to help maintain full clamp force with Class 10 fasteners, suitable for general metric assemblies.
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M18
19 mm
34 mm
3 mm
Carbon Steel
Zinc Plated
25
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Metric Zinc Plated Flat Washers
Metric Zinc Plated Flat Washers
Metric zinc plated flat washers made from alloy steel with a zinc finish and Class 8 strength. Available in a range of metric diameters and thicknesses, they provide corrosion resistance and help distribute load for bolted joints; suitable for general fastening and assembly tasks.
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M4
4.3 mm
9 mm
0.8 mm
Alloy Steel
Zinc Plated
100
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M5
5.3 mm
10 mm
1 mm
Alloy Steel
Zinc Plated
50
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M6
6.4 mm
12.5 mm
1.6 mm
Alloy Steel
Zinc Plated
50
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M7
7.4 mm
14 mm
1.6 mm
Alloy Steel
Zinc Plated
50
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M8
8.4 mm
17 mm
1.6 mm
Alloy Steel
Zinc Plated
50
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M10
10.5 mm
20 mm
2 mm
Alloy Steel
Zinc Plated
50
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M12
13 mm
24 mm
2.5 mm
Alloy Steel
Zinc Plated
50
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M14
15 mm
28 mm
2.5 mm
Alloy Steel
Zinc Plated
25
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M16
17 mm
30 mm
3 mm
Alloy Steel
Zinc Plated
25
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M18
19 mm
34 mm
3 mm
Alloy Steel
Zinc Plated
25
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M20
21 mm
37 mm
3 mm
Alloy Steel
Zinc Plated
25
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M24
25 mm
44 mm
4 mm
Alloy Steel
Zinc Plated
10
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Metric Plain Finish Flat Washers
Metric Plain Finish Flat Washers
Metric plain flat washers manufactured from alloy steel with a plain silver finish and Class 8 strength. Available in common metric bore sizes with standard OD and thickness proportions, they provide uniform load distribution and help protect mating surfaces in general fastening applications.
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M4
4.3 mm
9 mm
0.8 mm
Alloy Steel
Plain
50
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M5
5.3 mm
10 mm
1 mm
Alloy Steel
Plain
50
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M6
6.4 mm
12.5 mm
1.6 mm
Alloy Steel
Plain
50
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M8
8.4 mm
17 mm
1.6 mm
Alloy Steel
Plain
50
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M10
10.5 mm
21 mm
2 mm
Alloy Steel
Plain
50
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Grade 2 Galvanized Flat Washers
Grade 2 Galvanized Flat Washers
Grade 2 galvanized flat washers made from carbon steel with a USS profile and hot-dip galvanized finish for enhanced corrosion resistance. Sized for common bolt diameters, they meet ASTM F844 for Grade 2 (A307) fasteners and provide consistent load distribution in assemblies.
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1/4"
5/16"
3/4"
1/16"
Carbon Steel
Galvanized
100
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5/16"
3/8"
7/8"
5/64"
Carbon Steel
Galvanized
100
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3/8"
7/16"
1"
5/64"
Carbon Steel
Galvanized
100
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1/2"
9/16"
1-3/8"
7/64"
Carbon Steel
Galvanized
50
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5/8"
11/16"
1-3/4"
9/64"
Carbon Steel
Galvanized
25
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3/4"
13/16"
2"
5/32"
Carbon Steel
Galvanized
25
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Nylon Flat Washers
Nylon Flat Washers
Nylon flat washers made from natural Nylon 6/6 offer lightweight, corrosion-resistant spacing and wear reduction between mating parts. They resist common shop chemicals and oils, provide electrical insulation, and perform to about 185 °F; useful for general assembly and light-duty hardware.
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#4
0.115"
1/4"
0.032"
Nylon 6/6
100
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#4
0.115"
1/4"
0.062"
Nylon 6/6
100
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#6
0.14"
5/16"
0.032"
Nylon 6/6
100
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#6
0.14"
5/16"
0.062"
Nylon 6/6
100
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#8
0.171"
3/8"
0.032"
Nylon 6/6
100
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#8
0.171"
3/8"
0.062"
Nylon 6/6
100
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#10
0.194"
3/8"
0.032"
Nylon 6/6
100
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#10
0.194"
3/8"
0.062"
Nylon 6/6
100
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1/4"
0.257"
1/2"
0.032"
Nylon 6/6
100
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1/4"
0.257"
1/2"
0.062"
Nylon 6/6
100
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5/16"
0.317"
1/2"
0.032"
Nylon 6/6
50
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5/16"
0.317"
1/2"
0.062"
Nylon 6/6
50
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Silicon Bronze Flat Washers
Silicon Bronze Flat Washers
Silicon bronze flat washers made from non-magnetic 651 alloy provide high corrosion resistance and good electrical conductivity. Flat, SAE-style washers resist seawater and atmospheric corrosion, making them suitable for marine, power generation, and industrial hardware applications.
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1/4"
0.281"
0.625"
0.05"
Silicon Bronze
50
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5/16"
0.344"
0.75"
0.062"
Silicon Bronze
50
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3/8"
0.406"
0.875"
0.062"
Silicon Bronze
25
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1/2"
0.563"
1.25"
0.078"
Silicon Bronze
25
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Brass Flat Washers
Brass Flat Washers
Brass flat washers in assorted SAE sizes with a natural finish. Precision inside and outside diameters provide consistent seating and load distribution, helping protect fastened surfaces and improve clamp stability for general hardware and marine/brass applications.
Bolt Size Inside Diameter Outside Diameter Material Package Qty Item #
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#4
0.115" - 0.13"
0.271" - 0.291"
Brass
100
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#6L
0.142" - 0.156"
0.368" - 0.383"
Brass
100
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#6S
0.142" - 0.156"
0.305" - 0.318"
Brass
100
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#8L
0.167" - 0.181"
0.43" - 0.449"
Brass
100
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#8S
0.167" - 0.181"
0.368" - 0.383"
Brass
100
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#10L
0.195" - 0.21"
0.49" - 0.51"
Brass
100
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#10S
0.195" - 0.21"
0.43" - 0.449"
Brass
100
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#12L
0.218" - 0.238"
0.552" - 0.572"
Brass
100
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#12S
0.221" - 0.236"
0.495" - 0.505"
Brass
100
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#14L
0.255" - 0.276"
0.678" - 0.696"
Brass
50
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#14S
0.255" - 0.276"
0.552" - 0.572"
Brass
100
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5/16" (#20L)
0.339" - 0.359"
0.868" - 0.89"
Brass
50
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Isoplastic Flat Washers
Isoplastic Flat Washers
Isoplastic flat washers made from fiberglass-reinforced thermoplastic polyurethane provide non-conductive, corrosion-resistant fastening for electrical and industrial assemblies. Heavy-duty construction improves impact strength and resists oils and common shop chemicals. Made in the U.S.A.
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3/8"
0.39"
3/4"
0.06"
Isoplastic
25
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1/2"
0.531"
1"
0.06"
Isoplastic
25
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F436 Galvanized Flat Washers
F436 Galvanized Flat Washers
F436 Galvanized flat washers made from alloy steel with a hot-dip galvanized finish. Manufactured to ASTM F436 for use with A325 and similar structural fasteners. The heavy plating improves corrosion resistance and helps protect joint surfaces during assembly for structural applications.
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5/8"
11/16"
1-5/16"
0.177"
Alloy Steel
Galvanized
50
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3/4"
13/16"
1-15/32"
0.177"
Alloy Steel
Galvanized
10
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7/8"
15/16"
1-3/4"
0.177"
Alloy Steel
Galvanized
10
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Aluminum Flat Washers
Aluminum Flat Washers
Aluminum flat washers made from 7075-T6 alloy with a USS profile and a 3/8" inside diameter. Lightweight and corrosion-resistant, helps reduce galvanic corrosion when fastening aluminum components and provides stable load distribution for general assembly use.
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5/16"
3/8"
3/4"
USS
25
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130 of 304 Results
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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