Internal Tooth Lock Washers
When vibration wants to back off your screws, internal tooth lock washers bite into the head and base metal to hold torque and help maintain electrical contact for grounding. The smooth outer edge installs clean without snagging. Choose zinc plated metric for everyday service or 410 stainless when you need magnetic corrosion resistance. We keep them ready to cut comebacks.
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Internal Tooth Lock Washers
Internal tooth lock washers made from alloy steel with zinc plating for corrosion resistance. Internal serrations provide bite into fastener heads and mating surfaces, helping prevent loosening under vibration. Suited for general fastening and maintenance applications.
| Item # | Bolt Size | Material | Finish | Package Qty | |||
|---|---|---|---|---|---|---|---|
|
|
374100
|
#6
|
Alloy Steel
|
Zinc Plated
|
100
|
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|
|
374102
|
#8
|
Alloy Steel
|
Zinc Plated
|
100
|
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|
|
374103
|
#10
|
Alloy Steel
|
Zinc Plated
|
100
|
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|
|
374101
|
#12
|
Alloy Steel
|
Zinc Plated
|
100
|
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|
|
374104
|
1/4"
|
Alloy Steel
|
Zinc Plated
|
100
|
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|
|
374105
|
5/16"
|
Alloy Steel
|
Zinc Plated
|
100
|
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|
|
374106
|
3/8"
|
Alloy Steel
|
Zinc Plated
|
100
|
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|
|
374107
|
7/16"
|
Alloy Steel
|
Zinc Plated
|
100
|
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|
|
374108
|
1/2"
|
Alloy Steel
|
Zinc Plated
|
100
|
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|
|
374109
|
9/16"
|
Alloy Steel
|
Zinc Plated
|
50
|
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|
|
374110
|
5/8"
|
Alloy Steel
|
Zinc Plated
|
50
|
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|
|
374112
|
3/4"
|
Alloy Steel
|
Zinc Plated
|
50
|
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Metric Internal Tooth Lock Washers
Metric internal tooth lock washers made from zinc-plated steel with internal teeth that bite into fastener heads and mating material to resist loosening. Smooth outer edge eases installation while the toothed design provides increased vibration resistance for general fastening.
| Item # | Bolt Size | Finish | Package Qty | |||
|---|---|---|---|---|---|---|
|
|
457106
|
M6
|
Zinc Plated
|
100
|
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|
|
457108
|
M8
|
Zinc Plated
|
100
|
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|
|
457110
|
M10
|
Zinc Plated
|
100
|
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|
|
457112
|
M12
|
Zinc Plated
|
100
|
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|
|
457114
|
M14
|
Zinc Plated
|
100
|
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|
|
457116
|
M16
|
Zinc Plated
|
100
|
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|
|
457120
|
M20
|
Zinc Plated
|
50
|
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410 Stainless Steel Internal Tooth Lock Washers
Internal tooth lock washers made from 410 stainless steel, offered in common SAE diameters. The magnetic 410 alloy provides durable corrosion resistance for general-purpose fastening and helps maintain joint tension by biting into mating surfaces.
| Item # | Bolt Size | Material | Package Qty | |||
|---|---|---|---|---|---|---|
|
|
338806
|
#6
|
410 Stainless Steel
|
100
|
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|
|
338808
|
#8
|
410 Stainless Steel
|
100
|
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|
|
338810
|
#10
|
410 Stainless Steel
|
100
|
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|
|
338812
|
#12
|
410 Stainless Steel
|
100
|
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|
|
338840
|
1/4"
|
410 Stainless Steel
|
100
|
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|
|
338850
|
5/16"
|
410 Stainless Steel
|
100
|
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|
|
338860
|
3/8"
|
410 Stainless Steel
|
100
|
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12 options | Item #:
374100
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7 options | Item #:
457106
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7 options | Item #:
338806
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