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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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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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About Nuts, Materials, and Finishes
More
18-8 Stainless Steel Cap Nuts

These cap nuts have good chemical resistance and may be mildly magnetic. 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 | ||||||
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Size | Dp. | Wd. | Ht. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||
3/8"-24 | 3/8" | 9/16" | 5/8" | 5 | 000000000 | 00000 |
Super-Corrosion-Resistant 316 Stainless Steel Cap Nuts

These cap nuts have excellent resistance to chemicals and salt water. Also known as acorn nuts, they 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 | Dp. | Wd. | Ht. | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||
3/8"-24 | 3/8" | 9/16" | 5/8" | 1 | 000000000 | 00000 |
Low-Strength Steel Cap Nuts

Also known 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.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||
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Size | Dp. | Wd. | Ht. | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||
3/8"-24 | 3/8" | 9/16" | 5/8" | 25 | 000000000 | 000000 |
Plastic Cap Nuts

These nylon 6/6 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.
Brass Cap Nuts

These cap nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. Also known as acorn nuts, they have a smooth rounded head that covers and protects threads while providing a finished appearance. All 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.
Low-Profile Cap Nuts

About 20% shorter than standard cap nuts, use these in low-profile applications. Also known as acorn nuts, they have a smooth rounded head that covers and protects threads while providing a finished appearance. Made from 18-8 stainless steel, they have good chemical resistance.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||
---|---|---|---|---|---|---|
Size | Dp. | Wd. | Ht. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||
3/8"-24 | 5/16" | 5/8" | 1/2" | 5 | 000000000 | 000000 |
Distorted-Thread Cap Locknuts

An irregularly shaped thread grips the bolt for a stronger hold than nylon-insert cap locknuts. Also known as acorn locknuts, a smooth rounded head that covers and protects threads while providing a finished appearance. Made from 18-8 stainless steel, they have good chemical resistance.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||
---|---|---|---|---|---|---|
Size | Dp. | Wd. | Ht. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||
3/8"-24 | 3/8" | 9/16" | 5/8" | 5 | 000000000 | 000000 |
Nylon-Insert Cap Locknuts


The nylon cap covers and grips the threads to resist loosening. They’re reusable, but their holding power lessens with each use. Nuts are steel with a nylon 6/6 cap and insert.
Zinc-plated nuts have a layer of zinc that protects the steel from rust in wet environments.
For technical drawings and 3-D models, click on a part number.