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About Hex Head Screws and Bolts
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Extreme-Strength Grade 9 Steel Hex Head Screws
Fully Threaded
Partially Threaded
Our strongest screws, these Grade 9 steel screws have a tensile strength of 180,000 psi—about 20% stronger than our high-strength steel screws. Use them for heavy duty stamping applications as well as earth-moving machinery such as bulldozers and excavators. The zinc yellow-chromate plating resists corrosion in wet environments. Grade 9 steel hex head screws are marked with nine radial lines. Length is measured from under the head. To maintain strength, use these screws with Grade 9 nuts and washers.
Head | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Wd. | Ht. | Tensile Strength, psi  | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Grade 9 Steel | ||||||||
1/4"-20 | ||||||||
| 1/2" | Fully Threaded | __ | 7/16" | 3/16" | 180,000 | 25 | 000000000 | 000000 |
| 3/4" | Fully Threaded | __ | 7/16" | 3/16" | 180,000 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | 7/16" | 3/16" | 180,000 | 25 | 000000000 | 00000 |
| 1 1/4" | Partially Threaded | 3/4" | 7/16" | 3/16" | 180,000 | 25 | 000000000 | 00000 |
| 1 1/2" | Partially Threaded | 3/4" | 7/16" | 3/16" | 180,000 | 25 | 000000000 | 00000 |
| 2" | Partially Threaded | 3/4" | 7/16" | 3/16" | 180,000 | 25 | 000000000 | 00000 |
| 2 1/2" | Partially Threaded | 3/4" | 7/16" | 3/16" | 180,000 | 10 | 000000000 | 0000 |
| 3" | Partially Threaded | 3/4" | 7/16" | 3/16" | 180,000 | 10 | 000000000 | 0000 |
5/16"-18 | ||||||||
| 1/2" | Fully Threaded | __ | 1/2" | 15/64" | 180,000 | 25 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | 1/2" | 15/64" | 180,000 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | 1/2" | 15/64" | 180,000 | 25 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | __ | 1/2" | 15/64" | 180,000 | 25 | 000000000 | 00000 |
| 1 1/2" | Partially Threaded | 7/8" | 1/2" | 15/64" | 180,000 | 10 | 000000000 | 0000 |
| 2" | Partially Threaded | 7/8" | 1/2" | 15/64" | 180,000 | 10 | 000000000 | 0000 |
| 2 1/2" | Partially Threaded | 7/8" | 1/2" | 15/64" | 180,000 | 10 | 000000000 | 0000 |
| 3" | Partially Threaded | 7/8" | 1/2" | 15/64" | 180,000 | 10 | 000000000 | 00000 |
3/8"-16 | ||||||||
| 3/4" | Fully Threaded | __ | 9/16" | 9/32" | 180,000 | 10 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | 9/16" | 9/32" | 180,000 | 10 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | 9/16" | 9/32" | 180,000 | 10 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 10 | 000000000 | 00000 |
| 1 3/4" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 10 | 000000000 | 00000 |
| 2" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 10 | 000000000 | 00000 |
| 2 1/4" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 10 | 000000000 | 00000 |
| 2 1/2" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 10 | 000000000 | 00000 |
| 3" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 5 | 000000000 | 0000 |
| 3 1/2" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 5 | 000000000 | 00000 |
| 4" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 1 | 000000000 | 0000 |
| 4 1/2" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 1 | 000000000 | 0000 |
| 5" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 1 | 000000000 | 0000 |
| 6" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 1 | 000000000 | 0000 |
7/16"-14 | ||||||||
| 1 1/2" | Fully Threaded | __ | 5/8" | 21/64" | 180,000 | 5 | 000000000 | 0000 |
| 2" | Partially Threaded | 1 1/8" | 5/8" | 21/64" | 180,000 | 5 | 000000000 | 0000 |
| 3" | Partially Threaded | 1 1/8" | 5/8" | 21/64" | 180,000 | 5 | 000000000 | 00000 |
| 4" | Partially Threaded | 1 1/8" | 5/8" | 21/64" | 180,000 | 1 | 000000000 | 0000 |
1/2"-13 | ||||||||
| 1" | Fully Threaded | __ | 3/4" | 3/8" | 180,000 | 5 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | 3/4" | 3/8" | 180,000 | 5 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | __ | 3/4" | 3/8" | 180,000 | 5 | 000000000 | 00000 |
| 1 3/4" | Fully Threaded | __ | 3/4" | 3/8" | 180,000 | 5 | 000000000 | 00000 |
| 2" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 5 | 000000000 | 00000 |
| 2 1/2" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 5 | 000000000 | 00000 |
| 3" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 5 | 000000000 | 00000 |
| 3 1/2" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 1 | 000000000 | 0000 |
| 4" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 1 | 000000000 | 0000 |
| 4 1/2" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 1 | 000000000 | 0000 |
| 5" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 1 | 000000000 | 0000 |
| 6" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 1 | 000000000 | 0000 |
5/8"-11 | ||||||||
| 1 1/2" | Fully Threaded | __ | 15/16" | 15/32" | 180,000 | 1 | 000000000 | 0000 |
| 1 3/4" | Fully Threaded | __ | 15/16" | 15/32" | 180,000 | 1 | 000000000 | 0000 |
| 2" | Fully Threaded | __ | 15/16" | 15/32" | 180,000 | 1 | 000000000 | 0000 |
| 2 1/4" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 000000000 | 0000 |
| 2 1/2" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 000000000 | 0000 |
| 2 3/4" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 000000000 | 0000 |
| 3" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 000000000 | 0000 |
| 3 1/2" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 000000000 | 0000 |
| 4" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 000000000 | 0000 |
| 4 1/2" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 000000000 | 0000 |
| 5" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 000000000 | 0000 |
| 6" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 000000000 | 0000 |
3/4"-10 | ||||||||
| 1 1/2" | Fully Threaded | __ | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 0000 |
| 2" | Fully Threaded | __ | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 0000 |
| 2 1/4" | Fully Threaded | __ | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 0000 |
| 2 1/2" | Fully Threaded | __ | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 0000 |
| 2 3/4" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 0000 |
| 3" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 0000 |
| 3 1/2" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 0000 |
| 4" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 00000 |
| 4 1/2" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 00000 |
| 5" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 00000 |
| 5 1/2" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 00000 |
| 6" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 00000 |
| 7" | Partially Threaded | 2" | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 00000 |
| 8" | Partially Threaded | 2" | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 00000 |
| 10" | Partially Threaded | 2" | 1 1/8" | 9/16" | 180,000 | 1 | 000000000 | 00000 |
1"-8 | ||||||||
| 2" | Fully Threaded | __ | 1 1/2" | 3/4" | 180,000 | 1 | 000000000 | 00000 |
| 3" | Fully Threaded | __ | 1 1/2" | 3/4" | 180,000 | 1 | 000000000 | 00000 |
| 4" | Partially Threaded | 1 1/8" | 1 1/2" | 3/4" | 180,000 | 1 | 000000000 | 00000 |
| 5" | Partially Threaded | 2 1/8" | 1 1/2" | 3/4" | 180,000 | 1 | 000000000 | 00000 |
| 6" | Partially Threaded | 2 1/4" | 1 1/2" | 3/4" | 180,000 | 1 | 000000000 | 00000 |