Fastener Strength Grade/Class Fastener StrengthGrade/Class  | Show |
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 | Distorted Thread |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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About Nuts, Materials, and Finishes
More
Extreme-Strength Steel Hex Nuts—Grade 9
These nuts are about 20% stronger than high-strength steel nuts and are often used in heavy machinery, such as earth-moving equipment. They're cadmium yellow-chromate plated to resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
Cadmium Yellow-Chromate Plated Steel—Grade 9 | |||||
|---|---|---|---|---|---|
| 1/4"-20 | 7/16" | 17/64" | 50 | 000000000 | 000000 |
| 1/4"-28 | 7/16" | 17/64" | 50 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 5/16" | 25 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 5/16" | 25 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 25/64" | 25 | 000000000 | 0000 |
| 3/8"-24 | 9/16" | 25/64" | 25 | 000000000 | 00000 |
| 7/16"-14 | 11/16" | 7/16" | 10 | 000000000 | 0000 |
| 7/16"-20 | 11/16" | 7/16" | 10 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 17/32" | 10 | 000000000 | 0000 |
| 1/2"-20 | 3/4" | 17/32" | 10 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 11/16" | 5 | 000000000 | 0000 |
| 5/8"-18 | 15/16" | 11/16" | 5 | 000000000 | 0000 |
| 3/4"-10 | 1 1/8" | 25/32" | 1 | 000000000 | 0000 |
| 3/4"-16 | 1 1/8" | 25/32" | 1 | 000000000 | 0000 |
| 7/8"-9 | 1 5/16" | 55/64" | 1 | 000000000 | 0000 |
| 7/8"-14 | 1 5/16" | 55/64" | 1 | 000000000 | 0000 |
| 1"-8 | 1 1/2" | 1" | 1 | 000000000 | 00000 |
| 1"-14 | 1 1/2" | 1" | 1 | 000000000 | 00000 |
Extreme-Strength Steel Top-Lock
Distorted-Thread Locknuts
These locknuts have an irregularly shaped thread at the top of the nut that grips the bolt for a stronger hold than nylon-insert locknuts. They thread on from the bottom of the nut, allowing more threads to engage the bolt before tightening for easier installation than center-lock distorted thread locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. They're not reusable. About 20% stronger than high-strength steel locknuts, they're often used in heavy machinery, such as earth-moving equipment. A cadmium plating provides corrosion resistance in wet environments and adds lubricity so they thread on smoothly.
For technical drawings and 3-D models, click on a part number.