System of Measurement System of Measurement |
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Thread Size Thread Size | Show |
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Thread Size Thread Size | Hide |
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Material Material |
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Finish Finish |
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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 |
Thread Spacing Thread Spacing |
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Thread Type Thread Type |
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Drive Style Drive Style |
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Thread Fit Thread Fit |
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Thread Direction Thread Direction |
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Hex Nut Profile Hex Nut Profile |
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 | Standard |
DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Face Style Face Style |
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For Spanner Wrench Style For Spanner Wrench Style |
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For Cotter Pin Diameter For Cotter Pin Diameter |
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About Nuts, Materials, and Finishes
More
About Shaft Collars
Shaft collars are useful for holding and positioning components on a shaft. They can also serve as mechanical stops and stroke limiters.
More
Metric High-Strength Steel
Nylon-Insert Locknuts—Class 10
A nylon insert keeps metric bolt threads from coming loose due to vibration, wear, and temperature swings. About 25% stronger than medium-strength steel locknuts, these nuts are made of high-strength, Class 10 steel. They're used in valves, pumps, suspension systems, and other high-stress parts. A zinc plating prevents rust in wet areas. Combine with Class 10.9 metric bolts, which have similar strength. All are reusable but lose holding power after each use.
Some of these locknuts meet ISO 10511 (formerly DIN 985) or ISO 7040 (formerly DIN 982), which are international standards for dimensions. The ISO standards are functionally equivalent to the DIN standards with slight differences in width, height, or tolerances.
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. | |
Zinc-Plated Steel—Class 10  | ||||||||
| M42 | 4.5 | 65 | 42 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 000000 |
Metric Fine-Thread Medium-Strength
Steel Nylon-Insert Locknuts—Class 8
Get a grip on metric bolts exposed to vibration, wear, and changes in temperature. These metric locknuts have a nylon insert that holds onto bolts without damaging their threads. They have fine-pitch threads, which are closer together than coarse-pitch threads and less likely to loosen from vibration. Fine threads and coarse threads are not compatible. These locknuts are reusable but lose holding power with each use.
Made of Class 8 steel, these nuts are strong enough for use with most machinery and equipment. A zinc plating prevents rust in wet and damp areas. Combine them with Class 8.8 metric bolts, which are comparable in strength.
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, ISO 7040 and 10511 have replaced the inactive DIN standards.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||
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| Size | Pitch, mm | Wd., mm | Ht., mm | Insert Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 8 | ||||||||
| M42 | 3 | 65 | 42 | 220° | ISO 10511, DIN 985 | 1 | 000000000 | 000000 |
Metric Medium-Strength Steel Locknuts
for use with Cotter Pins—Class 8
Often referred to as castle nuts, secure these 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.
Steel locknuts are best for dry environments, since moisture will cause them to rust. They are weldable and can be painted or finished.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||||
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| Size | Pitch, mm | Wd., mm | Ht., mm | For Cotter Pin Dia., mm | Min. Slot Wd., mm | Min. Slot Dp., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Steel—Class 8 | ||||||||||
| M42 | 4.5 | 65 | 46 | 8 | 9 | 12 | DIN 935 | 1 | 000000000 | 000000 |
Bearing Retaining Locknuts
With a nylon insert that grips your threaded shaft or spindle without damaging the threads, these locknuts—sometimes called shaft nuts—keep bearings, bushings, gears, and pulleys in place. They won’t shake loose from vibration. However, their nylon insert also means you shouldn’t use these locknuts in applications with high temperatures. Their sides are slotted, so you can tighten and loosen them with a spanner wrench or spanner socket. To reduce the total size and weight of your assembly, they have chamfered edges.
All meet international standards for bearing locknut dimensions.
Carbon steel locknuts are strong and wear resistant. Zinc-plated steel locknuts have an outer layer of zinc that prevents the steel from rusting in wet areas. Compared to stainless steel, they're stronger, more wear resistant, and less costly, but not as corrosion resistant. Avoid exposing them to salt water and chemicals. When choosing your thread spacing, consider the precision of your application. The finer the threads, the more control you have when making adjustments.
For technical drawings and 3-D models, click on a part number.
Thread | Zinc-Plated Carbon Steel | |||||||
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| Size | Pitch, mm | Spacing | OD | Wd., mm | Insert Max. Temp., °F | Specifications Met | Each | |
Chamfered Face | ||||||||
| M42 | 1.5 | Extra Fine | 62mm | 15 | 210° | DIN 1805 | 0000000 | 000000 |