Finish Finish | Show |
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Finish Finish | Hide |
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Locking Type Locking Type |
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 | Nylon Insert |
Material Material |
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Hex Nut Profile Hex Nut Profile |
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| Standard | Thin |
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| Extra-Wide Thin |
Height Height |
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Fastener Strength Grade/Class Fastener StrengthGrade/Class |
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 | Class 8 |
Thread Direction Thread Direction |
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 | Right Hand |
Specifications Met Specifications Met |
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Drive Style Drive Style |
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 | External Hex |
About Nuts, Materials, and Finishes
More
Metric Medium-Strength Steel
Nylon-Insert Locknuts—Class 8
Made from medium-strength steel with a nylon insert, these Class 8 metric locknuts are strong enough to use on most machinery and equipment that’s prone to vibration and temperature changes. The nylon insert also won’t damage the threads on your bolt. All are reusable, but their holding power lessens with each use. Pair them with compatible Class 8.8 metric bolts.
These locknuts meet the dimensional and material standards of DIN and ISO that make sure they're compatible with other parts and tools. Although DIN 982 and 985 are no longer active standards, they’re still a common reference point for designers. With only slight differences in tolerance, the ISO 7041-2 standard has replaced the inactive DIN 982 standard. The ISO 7040 standard is similar to the inactive DIN 985 standard, except the overall height is a little taller.
Black ultra-corrosion-resistant coated steel locknuts are more corrosion resistant in wet environments than zinc-plated steel locknuts. They're also known as black luster locknuts.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Insert Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
Black Ultra-Corrosion-Resistant Coated Steel—Class 8 | ||||||||
| M4 | 0.7 | 7 | 5 | 220° | DIN 985, ISO 7040 | 5 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5 | 220° | DIN 985, ISO 7040 | 5 | 000000000 | 0000 |
| M6 | 1 | 10 | 6 | 220° | DIN 985, ISO 7040 | 5 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 8 | 220° | DIN 985, ISO 7040 | 5 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 10 | 220° | DIN 985, ISO 7040 | 5 | 000000000 | 00000 |
| M12 | 1.75 | 19 | 12 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 0000 |
| M14 | 2 | 22 | 14 | 220° | DIN 985, ISO 7040 | 1 | 000000000 | 0000 |
Low-Strength Steel Nylon-Insert Locknuts
These locknuts have a nylon insert that grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use. About half the strength of medium-strength steel locknuts, they're for light duty fastening applications, such as securing access panels.
Black ultra-corrosion-resistant coated steel nuts are more corrosion resistant in wet environments than zinc-plated steel nuts. They're also known as black luster nuts.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Insert Max. Temp., °F | Pkg. Qty. | Pkg. | |
Black Ultra-Corrosion-Resistant Coated Steel | ||||||
|---|---|---|---|---|---|---|
| 6-32 | 5/16" | 11/64" | 220° | 5 | 000000000 | 00000 |
| 8-32 | 11/32" | 15/64" | 220° | 5 | 000000000 | 0000 |
| 10-24 | 3/8" | 15/64" | 220° | 5 | 000000000 | 0000 |
| 10-32 | 3/8" | 15/64" | 220° | 5 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 5/16" | 220° | 5 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 11/32" | 220° | 5 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 29/64" | 220° | 5 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 19/32" | 220° | 5 | 000000000 | 0000 |
Low-Strength Steel Thin Nylon-Insert Locknuts
These locknuts are about half the height of standard nylon-insert locknuts. Use them in light duty low-clearance applications or jam one against a hex nut to hold it in place. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use.
Black ultra-corrosion-resistant coated steel nuts are more corrosion resistant than zinc-plated nuts in wet environments. They're also known as black luster locknuts.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Insert Max. Temp., °F | Pkg. Qty. | Pkg. | |
Black Ultra-Corrosion-Resistant Coated Steel | ||||||
|---|---|---|---|---|---|---|
| 6-32 | 5/16" | 1/8" | 220° | 5 | 000000000 | 00000 |
| 8-32 | 11/32" | 11/64" | 220° | 5 | 000000000 | 0000 |
| 10-24 | 3/8" | 11/64" | 220° | 5 | 000000000 | 0000 |
| 10-32 | 3/8" | 11/64" | 220° | 5 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 13/64" | 220° | 5 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 1/4" | 220° | 5 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 17/64" | 220° | 5 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 5/16" | 220° | 5 | 000000000 | 0000 |
Low-Strength Steel Extra-Wide Thin Nylon-Insert Locknuts
These locknuts are about half the height and 10% wider than standard nylon-insert locknuts. Use them in light duty low-clearance applications or jam one against an extra-wide hex nut to hold it in place. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use.
Black ultra-corrosion-resistant-coated steel locknuts are more corrosion resistant than zinc-plated locknuts in wet environments. They’re also known as black luster locknuts.
For technical drawings and 3-D models, click on a part number.
Metric Medium-Strength Steel
Nylon-Insert Flange Locknuts—Class 8
A nylon insert firmly grips threads to resist loosening and a flange distributes the load over a large area. These nuts are reusable, but their holding power lessens with each use. Suitable for fastening most machinery and equipment, they're comparable in strength to Class 8.8 bolts. Height includes the flange.
Black ultra-corrosion-resistant coated steel nuts are more corrosion resistant in wet environments than zinc-plated steel nuts. They're also known as black luster nuts.
For technical drawings and 3-D models, click on a part number.
Thread | Flange | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Dia., mm | Thick., mm | Insert Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
Black Ultra-Corrosion-Resistant Coated Steel—Class 8 | ||||||||||
| M5 | 0.8 | 8 | 7.1 | 11.8 | 1 | 250° | DIN 6926 | 5 | 000000000 | 00000 |
| M6 | 1 | 10 | 9.1 | 14.2 | 1.1 | 250° | DIN 6926 | 5 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 11.1 | 17.9 | 1.2 | 250° | DIN 6926 | 5 | 000000000 | 0000 |
| M12 | 1.75 | 18 | 16.1 | 26 | 1.8 | 250° | DIN 6926 | 5 | 000000000 | 0000 |