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Material Material |
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Thread Depth Thread Depth |
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Specifications Met Specifications Met |
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Finish Finish |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Thread Fit Thread Fit |
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Thread Spacing Thread Spacing |
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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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Locking Type Locking Type |
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![]() | Nylon Insert |
DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Environment Environment |
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Maximum Temperature Maximum Temperature |
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About Nuts, Materials, and Finishes
More
Metric 18-8 Stainless Steel Cap Nuts

Made from 18-8 stainless steel, these cap nuts have good chemical resistance and may be mildly magnetic. Also known as acorn nuts, these nuts have a smooth rounded head that covers and protects threads while providing a finished appearance.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||
---|---|---|---|---|---|---|---|---|
Size | Pitch, mm | Dp., mm | Wd., mm | Ht., mm | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
M3 | 0.5 | 3.8 | 5.5 | 6 | DIN 1587 | 10 | 000000000 | 00000 |
M4 | 0.7 | 5.7 | 7 | 8 | DIN 1587 | 25 | 000000000 | 0000 |
M5 | 0.8 | 7.2 | 8 | 10 | DIN 1587 | 25 | 000000000 | 0000 |
M6 | 1 | 7.7 | 10 | 12 | DIN 1587 | 20 | 000000000 | 0000 |
M8 | 1.25 | 10.7 | 13 | 15 | DIN 1587 | 10 | 000000000 | 0000 |
M10 | 1.5 | 12.7 | 17 | 18 | DIN 1587 | 5 | 000000000 | 0000 |
M12 | 1.75 | 15.7 | 19 | 22 | DIN 1587 | 5 | 000000000 | 0000 |
M14 | 2 | 17.7 | 22 | 25 | DIN 1587 | 1 | 000000000 | 0000 |
M16 | 2 | 20.6 | 24 | 28 | DIN 1587 | 1 | 000000000 | 0000 |
M18 | 2.5 | 24.6 | 27 | 32 | DIN 1587 | 1 | 000000000 | 0000 |
M20 | 2.5 | 25.6 | 30 | 34 | DIN 1587 | 1 | 000000000 | 0000 |
M22 | 2.5 | 28.6 | 34 | 39 | DIN 1587 | 1 | 000000000 | 0000 |
M24 | 3 | 30.5 | 36 | 42 | DIN 1587 | 1 | 000000000 | 0000 |
Metric Super-Corrosion-Resistant 316 Stainless Steel Cap Nuts

Made from 316 stainless steel, these nuts have excellent resistance to chemicals and salt water. Also known as acorn nuts, these nuts have a smooth rounded head that covers and protects threads while providing a finished appearance. They may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||
---|---|---|---|---|---|---|---|---|
Size | Pitch, mm | Dp., mm | Wd., mm | Ht., mm | Specifications Met | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||||
M3 | 0.5 | 3.8 | 5.5 | 6 | DIN 1587 | 25 | 000000000 | 00000 |
M4 | 0.7 | 5.5 | 7 | 8 | DIN 1587 | 25 | 000000000 | 0000 |
M5 | 0.8 | 7.5 | 8 | 10 | DIN 1587 | 25 | 000000000 | 0000 |
M6 | 1 | 8 | 10 | 12 | DIN 1587 | 25 | 000000000 | 00000 |
M8 | 1.25 | 11 | 13 | 15 | DIN 1587 | 10 | 000000000 | 0000 |
M10 | 1.5 | 13 | 17 | 18 | DIN 1587 | 10 | 000000000 | 00000 |
M12 | 1.75 | 16 | 19 | 22 | DIN 1587 | 5 | 000000000 | 00000 |
M14 | 2 | 18 | 22 | 25 | DIN 1587 | 1 | 000000000 | 0000 |
M16 | 2 | 21 | 24 | 28 | DIN 1587 | 1 | 000000000 | 0000 |
M20 | 2.5 | 26 | 30 | 34 | DIN 1587 | 1 | 000000000 | 00000 |
M22 | 2.5 | 29 | 34 | 39 | DIN 1587 | 1 | 000000000 | 00000 |
M24 | 3 | 31 | 36 | 42 | DIN 1587 | 1 | 000000000 | 00000 |
Metric Low-Strength Steel Cap Nuts

Often referred to as acorn nuts, these nuts have a smooth rounded head that covers and protects threads while providing a finished appearance. About half the strength of medium-strength steel cap nuts, use them in light duty fastening applications, such as securing access panels.
Zinc-plated steel cap nuts resist corrosion in wet environments.
Chrome-plated steel cap nuts have excellent resistance to chemicals and salt water and have a decorative metallic finish.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||
---|---|---|---|---|---|---|---|---|
Size | Pitch, mm | Dp., mm | Wd., mm | Ht., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||
M4 | 0.7 | 5.3 | 7 | 8 | DIN 1587 | 50 | 000000000 | 000000 |
M5 | 0.8 | 7.2 | 8 | 10 | DIN 1587 | 50 | 000000000 | 00000 |
M6 | 1 | 7.7 | 10 | 12 | DIN 1587 | 50 | 000000000 | 00000 |
M8 | 1.25 | 10.7 | 13 | 15 | DIN 1587 | 25 | 000000000 | 00000 |
M10 | 1.5 | 12.7 | 17 | 18 | DIN 1587 | 10 | 000000000 | 0000 |
M12 | 1.75 | 15.7 | 19 | 22 | DIN 1587 | 10 | 000000000 | 00000 |
Chrome-Plated Steel | ||||||||
M4 | 0.7 | 3.9 | 7 | 8 | DIN 1587 | 5 | 000000000 | 00000 |
M5 | 0.8 | 5.6 | 8 | 10 | DIN 1587 | 5 | 000000000 | 00000 |
M6 | 1 | 5.7 | 10 | 12 | DIN 1587 | 5 | 000000000 | 00000 |
M8 | 1.25 | 8.2 | 13 | 15 | DIN 1587 | 1 | 000000000 | 0000 |
M10 | 1.5 | 9.7 | 17 | 18 | DIN 1587 | 1 | 000000000 | 0000 |
M12 | 1.75 | 12.2 | 19 | 22 | DIN 1587 | 1 | 000000000 | 0000 |
Metric High-Strength Steel Cap Nuts—Class 10

Often referred to as acorn nuts, these nuts have a smooth rounded head that covers and protects threads while providing a finished appearance. They're about 25% stronger than medium-strength steel cap nuts and comparable in strength to Class 10.9 bolts. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Metric Plastic Cap Nuts

Made from nylon 6/6, these cap nuts are chemical resistant, nonconductive, and lightweight. Also known as acorn nuts, they have a smooth rounded head that covers and protects threads while providing a finished appearance.
For technical drawings and 3-D models, click on a part number.
Thread | |||||||||
---|---|---|---|---|---|---|---|---|---|
Size | Pitch, mm | Dp., mm | Wd., mm | Ht., mm | Temp. Range, °F | Choose a Color | Pkg. Qty. | Pkg. | |
Nylon 6/6 Plastic | |||||||||
M4 | 0.7 | 5.9 | 7 | 8 | -40° to 185° | 100 | 000000000 | 000000 | |
M5 | 0.8 | 6.8 | 8 | 10 | -40° to 185° | 100 | 000000000 | 00000 | |
M6 | 1 | 8 | 10 | 12 | -40° to 185° | 100 | 000000000 | 00000 | |
M8 | 1.25 | 8.6 | 13 | 15 | -40° to 185° | 50 | 000000000 | 00000 | |
M10 | 1.5 | 11 | 17 | 18 | -40° to 185° | 25 | 000000000 | 00000 | |
M12 | 1.75 | 13.9 | 19 | 20.5 | -40° to 185° | 25 | 000000000 | 00000 |
Sanitary Low-Profile Cap Nuts

Certified by EHEDG (European Hygienic Engineering and Design Group) to meet sanitary design standards, these cap nuts fit into tight spaces to cover and seal exposed threads in your food processing facility. Also known as acorn nuts, they’re at least 20% shorter than standard cap nuts. Made from 316 stainless steel, these nuts won’t corrode from frequent washdowns with water or harsh cleaners. They are self-draining, meaning that they don’t have horizontal surfaces, so liquids and debris will drain off completely. They also have extremely smooth sides and rounded edges to eliminate crevices where bacteria could grow.
The silicone seal at the base of the nut keeps contaminants off the threads and prevents an unsanitary metal-to-metal connection. It’s made with metal and chemical additives, so you can find it with a metal detector or X-ray machine if it falls into your line. This helps you comply with Hazard Analysis and Critical Control Point (HACCP) programs to keep contaminated food from leaving your facility. The seal is also FDA compliant, so it’s safe for direct contact with food.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||
---|---|---|---|---|---|---|---|---|
Size | Pitch | Dp. | Wd. | Ht. | Performance Properties | Specifications Met | Each | |
316 Stainless Steel—Silicone Rubber Seal | ||||||||
Metric | ||||||||
M6 | 1 mm | 5.5mm | 10mm | 8mm | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 000000 |
M8 | 1.25 mm | 6.5mm | 13mm | 10mm | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
M10 | 1.5 mm | 8mm | 16mm | 12mm | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
M12 | 1.75 mm | 9mm | 18mm | 14mm | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
M16 | 2 mm | 10.5mm | 24mm | 17mm | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
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 | |||||||||
---|---|---|---|---|---|---|---|---|---|
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 |