System of Measurement System of Measurement |
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Fastener Strength Grade/Class Fastener StrengthGrade/Class | Show |
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Fastener Strength Grade/Class Fastener StrengthGrade/Class | Hide |
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Nut Type Nut Type | Show |
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![]() | Locknut |
Material Material |
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Locking Type Locking Type |
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![]() | Distorted Thread |
Distorted Thread Type Distorted Thread Type |
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![]() | Top Lock |
Thread Direction Thread Direction |
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Hex Nut Profile Hex Nut Profile |
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![]() | Standard |
Thread Fit Thread Fit |
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Thread Type Thread Type |
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Thread Spacing Thread Spacing |
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Finish Finish |
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Drive Style Drive Style |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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About Nuts, Materials, and Finishes
More
Extreme-Strength Steel Top-Lock
Distorted-Thread Locknuts

These locknuts have an irregularly shaped thread at the top of the nut that grips the bolt for a stronger hold than nylon-insert locknuts. They thread on from the bottom of the nut, allowing more threads to engage the bolt before tightening for easier installation than center-lock distorted thread locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. They're not reusable. About 20% stronger than high-strength steel locknuts, they're often used in heavy machinery, such as earth-moving equipment. A cadmium plating provides corrosion resistance in wet environments and adds lubricity so they thread on smoothly.
For technical drawings and 3-D models, click on a part number.