Thread Pitch Thread Pitch |
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Height Height |
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Finish Finish |
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Thread Direction Thread Direction |
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| Right Hand | Left Hand |
Drive Style Drive Style |
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| External Hex | External Square |
RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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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
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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.
Zinc-plated steel locknuts resist corrosion in wet environments.
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 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 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. | |
Zinc-Plated Steel—Class 8 | ||||||||||
| M6 | 1 | 10 | 7.5 | 1.6 | 2 | 2.5 | DIN 935 | 5 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 9.5 | 2 | 2.5 | 3 | DIN 935 | 5 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 12 | 2.5 | 2.8 | 4 | DIN 935 | 5 | 000000000 | 0000 |
| M12 | 1.5 | 19 | 15 | 3.2 | 3.5 | 5 | DIN 935 | 5 | 000000000 | 0000 |
| M12 | 1.75 | 19 | 15 | 3.2 | 3.5 | 5 | DIN 935 | 5 | 000000000 | 0000 |
| M14 | 1.5 | 22 | 16 | 3.2 | 3.5 | 5 | DIN 935 | 1 | 000000000 | 0000 |
| M14 | 2 | 22 | 16 | 3.2 | 3.5 | 5 | DIN 935 | 1 | 000000000 | 0000 |
| M16 | 1.5 | 24 | 19 | 4 | 4.5 | 6 | DIN 935 | 10 | 000000000 | 00000 |
| M16 | 2 | 24 | 19 | 4 | 4.5 | 6 | DIN 935 | 5 | 000000000 | 0000 |
| M18 | 2.5 | 27 | 21 | 4 | 4.5 | 6 | DIN 935 | 1 | 000000000 | 0000 |
| M20 | 2.5 | 30 | 22 | 4 | 4.5 | 6 | DIN 935 | 5 | 000000000 | 00000 |
| M24 | 2 | 36 | 27 | 5 | 5.5 | 8 | DIN 935 | 1 | 000000000 | 0000 |
| M24 | 3 | 36 | 27 | 5 | 5.5 | 8 | DIN 935 | 1 | 000000000 | 0000 |
| M27 | 3 | 41 | 30 | 5 | 5.5 | 8 | DIN 935 | 1 | 000000000 | 00000 |
| M30 | 3.5 | 46 | 33 | 6.3 | 7 | 9 | DIN 935 | 1 | 000000000 | 00000 |
Steel—Class 8 | ||||||||||
| M12 | 1.5 | 19 | 15 | 3.2 | 3.5 | 5 | DIN 935 | 10 | 000000000 | 0000 |
| M14 | 1.5 | 22 | 16 | 3.2 | 3.5 | 5 | DIN 935 | 1 | 000000000 | 0000 |
| M14 | 2 | 22 | 16 | 3.2 | 3.5 | 5 | DIN 935 | 1 | 000000000 | 0000 |
| M16 | 1.5 | 24 | 19 | 4 | 4.5 | 6 | DIN 935 | 1 | 000000000 | 0000 |
| M16 | 2 | 24 | 19 | 4 | 4.5 | 6 | DIN 935 | 1 | 000000000 | 0000 |
| M18 | 2.5 | 27 | 21 | 4 | 4.5 | 6 | DIN 935 | 1 | 000000000 | 0000 |
| M20 | 2.5 | 30 | 22 | 4 | 4.5 | 6 | DIN 935 | 1 | 000000000 | 0000 |
| M24 | 3 | 36 | 27 | 5 | 5.5 | 8 | DIN 935 | 1 | 000000000 | 0000 |
| M30 | 3.5 | 46 | 33 | 6.3 | 7 | 9 | DIN 935 | 1 | 000000000 | 00000 |
| M36 | 3 | 55 | 38 | 6.3 | 7 | 9 | DIN 935 | 1 | 000000000 | 00000 |
| M36 | 4 | 55 | 38 | 6.3 | 7 | 9 | DIN 935 | 1 | 000000000 | 00000 |
| M42 | 4.5 | 65 | 46 | 8 | 9 | 12 | DIN 935 | 1 | 000000000 | 00000 |
| M48 | 5 | 75 | 50 | 8 | 9 | 12 | DIN 935 | 1 | 000000000 | 00000 |
| M56 | 5.5 | 85 | 57 | 8 | 9 | 12 | DIN 935 | 1 | 000000000 | 00000 |
Metric Left-Hand Threaded Medium-Strength Steel Hex Nuts
These metric nuts tighten when turned to the left; once fastened, they resist loosening from counterclockwise motion. They are suitable for fastening most machinery and equipment. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Metric Low-Strength Steel Square Nuts
Large flat sides make these metric nuts easy to grip with a wrench and keep them from rotating in channels and square holes. About half the strength of medium-strength steel square nuts, use them in light duty fastening applications, such as securing access panels.
Steel square nuts are best for dry environments, since moisture will cause them to rust.
Zinc-plated steel square nuts resist corrosion in wet environments.
Black zinc-plated steel square nuts resist corrosion in wet environments and have a black finish that blends in with dark surfaces.
For technical drawings and 3-D models, click on a part number.
Thread | |||||||
|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Steel—Class 5 | |||||||
| M4 | 0.7 | 7 | 3 | DIN 557 | 50 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 4 | DIN 557 | 50 | 000000000 | 00000 |
| M6 | 1 | 10 | 5 | DIN 557 | 25 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 6.5 | DIN 557 | 25 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 8 | DIN 557 | 10 | 000000000 | 0000 |
| M12 | 1.75 | 19 | 10 | DIN 557 | 5 | 000000000 | 0000 |
| M16 | 2 | 24 | 13 | DIN 557 | 1 | 000000000 | 0000 |
Zinc-Plated Steel—Class 5 | |||||||
| M4 | 0.7 | 7 | 3.2 | DIN 557 | 100 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 4 | DIN 557 | 100 | 000000000 | 00000 |
| M6 | 1 | 10 | 5 | DIN 557 | 100 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 6.5 | DIN 557 | 25 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 8 | DIN 557 | 25 | 000000000 | 00000 |
| M12 | 1.75 | 19 | 10 | DIN 557 | 10 | 000000000 | 0000 |
| M16 | 2 | 24 | 13 | DIN 557 | 5 | 000000000 | 00000 |
| M20 | 2.5 | 30 | 16 | DIN 557 | 5 | 000000000 | 00000 |
Black Zinc-Plated Steel—Class 5 | |||||||
| M4 | 0.7 | 7 | 3 | DIN 557 | 25 | 000000000 | 0000 |
| M5 | 0.8 | 8 | 4 | DIN 557 | 25 | 000000000 | 0000 |
| M6 | 1 | 10 | 5 | DIN 557 | 25 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 6.5 | DIN 557 | 10 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 8 | DIN 557 | 10 | 000000000 | 00000 |
| M12 | 1.75 | 19 | 10 | DIN 557 | 5 | 000000000 | 0000 |
| M16 | 2 | 24 | 13 | DIN 557 | 1 | 000000000 | 0000 |