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About Nuts, Materials, and Finishes
More
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.
Black ultra-corrosion-resistant coated steel cap nuts have excellent resistance to chemicals and salt water.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||
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Size | Dp. | Wd. | Ht. | Pkg. Qty. | Pkg. | |
Black Ultra-Corrosion-Resistant Coated Steel | ||||||
4-40 | 5/32" | 1/4" | 1/4" | 10 | 000000000 | 000000 |
6-32 | 5/32" | 5/16" | 11/32" | 10 | 000000000 | 00000 |
8-32 | 5/32" | 5/16" | 11/32" | 10 | 000000000 | 00000 |
10-24 | 3/16" | 3/8" | 13/32" | 5 | 000000000 | 0000 |
10-32 | 3/16" | 3/8" | 13/32" | 5 | 000000000 | 0000 |
1/4"-20 | 1/4" | 7/16" | 15/32" | 5 | 000000000 | 0000 |
5/16"-18 | 5/16" | 1/2" | 17/32" | 5 | 000000000 | 0000 |
3/8"-16 | 3/8" | 9/16" | 5/8" | 1 | 000000000 | 0000 |
7/16"-14 | 7/16" | 5/8" | 11/16" | 1 | 000000000 | 0000 |
1/2"-13 | 1/2" | 3/4" | 13/16" | 1 | 000000000 | 0000 |
9/16"-12 | 9/16" | 7/8" | 15/16" | 1 | 000000000 | 0000 |
5/8"-11 | 5/8" | 15/16" | 1" | 1 | 000000000 | 0000 |
Medium-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. Made from Grade 5 steel, they're suitable for fastening most machinery and equipment.
Black ultra-corrosion-resistant coated steel cap nuts have excellent resistance to chemicals and salt water.
For technical drawings and 3-D models, click on a part number.
High-Strength Steel Cap Nuts—Grade 8

Also known 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.
Black ultra-corrosion-resistant coated steel cap nuts have excellent resistance to chemicals and salt water.
For technical drawings and 3-D models, click on a part number.