System of Measurement System of Measurement |
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Nut Type Nut Type | Show |
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 | Locknut |
Locking Type Locking Type |
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| Nylon Insert | Spring-Stop |
Fastener Strength Grade/Class Fastener StrengthGrade/Class  | Show |
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Fastener Strength Grade/Class Fastener StrengthGrade/Class | Hide |
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Material Material |
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Finish Finish |
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Thread Direction Thread Direction |
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Hex Nut Profile Hex Nut Profile |
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 | Standard |
Cap Nut Profile Cap Nut Profile |
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 | Standard |
Thread Spacing Thread Spacing |
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Drive Style Drive Style |
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Thread Fit Thread Fit |
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Specifications Met Specifications Met |
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Thread Type Thread Type |
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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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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Insert Maximum Temperature Insert Maximum Temperature |
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About Nuts, Materials, and Finishes
More
Metric Low-Strength Steel Spring-Stop Locknuts—Class 6
These locknuts, also known as Fuji locknuts, maintain their holding power with reuse longer than nylon-insert locknuts. They have a spring ring that creates tension as you tighten the nut, keeping them in place. Yet, their design makes them easy to install and remove. All stand up to high heat and vibration. Zinc plated, they resist rusting in wet or dry environments.
For technical drawings and 3-D models, click on a part number.
Metric Stainless Steel Spring-Stop Locknuts
For a secure hold where chemicals are a concern, these stainless steel locknuts—also known as Fuji locknuts—have a spring that creates tension when tightened. Reuse them without losing holding power like you do with nylon-insert locknuts. Made of metal, they'll stand up to high temperatures and vibration. They're designed for easy installation and removal. May be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
Metric Nylon-Insert Cap Locknuts
A nylon insert on these metric nuts prevents vibration from loosening them, and a domed head protects the threads at the end of the bolt from damage and debris. These nuts are reusable, but the nylon insert’s holding power decreases with each use. Also known as acorn nuts, they create a finished appearance and can reduce snagging on wires and insulation. Nuts meet DIN 986, an international standard for domed cap nut dimensions.
These nuts are made of strong and wear-resistant Class 6 steel. A zinc plating extends the life of the nut by protecting the inner steel from rust.
For technical drawings and 3-D models, click on a part number.
Thread | |||||||||
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| Size | Pitch, mm | Dp., mm | Wd., mm | Ht., mm | Insert Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 6 | |||||||||
| M4 | 0.7 | 2.3 | 7 | 9.6 | 245° | DIN 986 | 50 | 000000000 | 000000 |
| M5 | 0.8 | 3.5 | 8 | 10.5 | 245° | DIN 986 | 25 | 000000000 | 0000 |
| M6 | 1 | 3.9 | 10 | 12 | 245° | DIN 986 | 25 | 000000000 | 0000 |
| M8 | 1.25 | 5.2 | 13 | 14 | 245° | DIN 986 | 25 | 000000000 | 00000 |
| M10 | 1.5 | 6.4 | 16 | 18 | 245° | DIN 986 | 10 | 000000000 | 0000 |
| M12 | 1.75 | 8.3 | 18 | 23 | 245° | DIN 986 | 5 | 000000000 | 0000 |
| M16 | 2 | 11.3 | 24 | 28 | 245° | DIN 986 | 1 | 000000000 | 0000 |
| M20 | 2.5 | 13.5 | 30 | 35 | 245° | DIN 986 | 1 | 000000000 | 0000 |