System of Measurement System of Measurement |
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Thread Size Thread Size | Show |
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Thread Size Thread Size | Hide |
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Material Material |
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Thread Spacing Thread Spacing |
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Hex Nut Profile Hex Nut Profile |
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| Standard | Extra Wide |
Thread Direction Thread Direction |
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Drive Style Drive Style |
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| Hex | External Hex |
DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Finish Finish |
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Locking Type Locking Type |
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 | Nylon Insert |
Minimum Thread Length Minimum Thread Length |
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Threading Threading |
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 | Partially Threaded |
Head Type Head Type |
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 | Socket |
Hardness Hardness |
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About Nuts, Materials, and Finishes
More
About Socket Head Screws
More
Alloy Steel Socket Head Screws
With a tensile strength of 170,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. Length is measured from under the head.
Black-oxide steel screws are mildly corrosion resistant in dry environments. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance. They are not compatible with coarse threads.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||||
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| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
2 1/4"-8 | |||||||||||
Black-Oxide Alloy Steel | |||||||||||
| 6" | Partially Threaded | 5 5/8" | Coarse | 3 3/8" | 2 1/4" | 1 3/4" | 170,000 | ASTM A574 | 1 | 000000000 | 0000000 |
| 8" | Partially Threaded | 5 5/8" | Coarse | 3 3/8" | 2 1/4" | 1 3/4" | 170,000 | ASTM A574 | 1 | 000000000 | 000000 |
| 10" | Partially Threaded | 5 5/8" | Coarse | 3 3/8" | 2 1/4" | 1 3/4" | 170,000 | ASTM A574 | 1 | 000000000 | 000000 |
Extreme-Strength Steel Extra-Wide Hex Nuts—Grade 2H
Also known as heavy hex nuts, these nuts are about 10% wider and taller than standard hex nuts and distribute the load over a large area. Grade 2H nuts are comparable in strength to Grade 9 bolts. They're about 20% stronger than high-strength steel nuts and are used in heavy machinery, such as earth-moving equipment.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
Steel—Grade 2H | ||||||
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| 2 1/4"-8 | 3 1/2" | 2 13/64" | ASME B18.2.2, ASTM A194 | 1 | 000000000 | 000000 |
High-Strength Steel Nylon-Insert Locknuts—Grade 8
A nylon insert grips the bolt to resist loosening without damaging threads. These nuts are reusable, but their holding power lessens with each use. Made from Grade 8 steel, they're about 25% stronger than medium-strength steel locknuts.
Steel locknuts without a finish are ready to be painted or finished.
Black-oxide steel locknuts have a dark surface color and are mildly corrosion resistant in dry environments.
Zinc yellow-chromate plated steel locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.