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Thread Size Thread Size | Show |
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Thread Size Thread Size | Hide |
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Thread Type Thread Type |
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Nut Type Nut Type | Show |
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Locking Type Locking Type |
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Nylon Insert | Cotter Pin |
Fastener Strength Grade/Class Fastener StrengthGrade/Class |
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Material Material |
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Thread Direction Thread Direction |
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Hex Nut Profile Hex Nut Profile |
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Thread Spacing Thread Spacing |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Thread Fit Thread Fit |
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Drive Style Drive Style |
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Insert Maximum Temperature Insert Maximum Temperature |
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Minimum Slot Depth Minimum Slot Depth |
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Minimum Slot Width Minimum Slot Width |
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For Cotter Pin Diameter For Cotter Pin Diameter |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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About Nuts, Materials, and Finishes
More
High-Strength Steel Nylon-Insert Locknuts—Grade 8

A nylon insert grips the bolt to resist loosening without damaging threads. These nuts are reusable, but their holding power lessens with each use. Made from Grade 8 steel, they're about 25% stronger than medium-strength steel locknuts.
Zinc yellow-chromate plated steel locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread Size | Wd. | Ht. | Insert Max. Temp., °F | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Steel—Grade 8 | ||||||
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2"-4 1/2 | 3 9/64" | 2 13/32" | 220° | 1 | 000000000 | 000000 |
Low-Strength Steel Locknuts for use with Cotter Pins


Secure these hex slotted nuts by inserting a cotter pin or safety wire through the slots and a drilled hole in your bolt for mild loosening resistance. They’re not recommended for use on parts exposed to high vibration because the pin is prone to shearing under prolonged stress. Height includes the slots. Cotter pins are not included. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread Size | Wd. | Ht. | For Cotter Pin Dia. | Min. Slot Wd. | Min. Slot Dp. | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||
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2"-4 1/2 | 3" | 1 23/32" | 3/8" | 0.43" | 0.485" | 1 | 000000000 | 000000 |