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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 | ||||||||
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Size | Pitch, mm | Dp., mm | Wd., mm | Ht., mm | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
M5 | 0.8 | 6 | 8 | 10 | DIN 1587 | 25 | 000000000 | 00000 |
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 | ||||||||
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Size | Pitch, mm | Dp., mm | Wd., mm | Ht., mm | Specifications Met | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||||
M5 | 0.8 | 7.5 | 8 | 10 | DIN 1587 | 25 | 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.
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.
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.
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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 | |||||||||
M5 | 0.8 | 3.5 | 8 | 10.5 | 245° | DIN 986 | 25 | 000000000 | 00000 |