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About Hex Head Screws and Bolts
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Choose hex head fasteners with the right threading types, thread sizes, and material for your equipment.
Extreme-Strength Grade 9 Steel Hex Head Screws
Fully Threaded
Partially Threaded
Our strongest steel screws, these have a tensile strength of 180,000 psi—about 20% stronger than our high-strength steel screws. They're often used for heavy duty stamping applications or on earth-moving equipment 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 | 90201A109 | 000000 |
| 3/4" | Fully Threaded | __ | 7/16" | 3/16" | 180,000 | 25 | 90201A111 | 00000 |
| 1" | Fully Threaded | __ | 7/16" | 3/16" | 180,000 | 25 | 90201A113 | 00000 |
| 1 1/4" | Partially Threaded | 3/4" | 7/16" | 3/16" | 180,000 | 25 | 90201A115 | 00000 |
| 1 1/2" | Partially Threaded | 3/4" | 7/16" | 3/16" | 180,000 | 25 | 90201A117 | 00000 |
| 2" | Partially Threaded | 3/4" | 7/16" | 3/16" | 180,000 | 25 | 90201A119 | 00000 |
| 2 1/2" | Partially Threaded | 3/4" | 7/16" | 3/16" | 180,000 | 10 | 90201A121 | 0000 |
| 3" | Partially Threaded | 3/4" | 7/16" | 3/16" | 180,000 | 10 | 90201A122 | 0000 |
5/16"-18 | ||||||||
| 1/2" | Fully Threaded | __ | 1/2" | 15/64" | 180,000 | 25 | 90201A222 | 00000 |
| 3/4" | Fully Threaded | __ | 1/2" | 15/64" | 180,000 | 25 | 90201A219 | 00000 |
| 1" | Fully Threaded | __ | 1/2" | 15/64" | 180,000 | 25 | 90201A221 | 00000 |
| 1 1/4" | Fully Threaded | __ | 1/2" | 15/64" | 180,000 | 25 | 90201A225 | 00000 |
| 1 1/2" | Partially Threaded | 7/8" | 1/2" | 15/64" | 180,000 | 10 | 90201A228 | 0000 |
| 2" | Partially Threaded | 7/8" | 1/2" | 15/64" | 180,000 | 10 | 90201A230 | 0000 |
| 2 1/2" | Partially Threaded | 7/8" | 1/2" | 15/64" | 180,000 | 10 | 90201A231 | 0000 |
| 3" | Partially Threaded | 7/8" | 1/2" | 15/64" | 180,000 | 10 | 90201A232 | 00000 |
3/8"-16 | ||||||||
| 3/4" | Fully Threaded | __ | 9/16" | 9/32" | 180,000 | 10 | 90201A312 | 0000 |
| 1" | Fully Threaded | __ | 9/16" | 9/32" | 180,000 | 10 | 90201A314 | 0000 |
| 1 1/4" | Fully Threaded | __ | 9/16" | 9/32" | 180,000 | 10 | 90201A316 | 0000 |
| 1 1/2" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 10 | 90201A319 | 00000 |
| 1 3/4" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 10 | 90201A321 | 00000 |
| 2" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 10 | 90201A323 | 00000 |
| 2 1/4" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 10 | 90201A324 | 00000 |
| 2 1/2" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 10 | 90201A327 | 00000 |
| 3" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 5 | 90201A331 | 0000 |
| 3 1/2" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 5 | 90201A333 | 00000 |
| 4" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 1 | 90201A336 | 0000 |
| 4 1/2" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 1 | 90201A339 | 0000 |
| 5" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 1 | 90201A342 | 0000 |
| 6" | Partially Threaded | 1" | 9/16" | 9/32" | 180,000 | 1 | 90201A345 | 0000 |
7/16"-14 | ||||||||
| 1 1/2" | Fully Threaded | __ | 5/8" | 21/64" | 180,000 | 5 | 90201A360 | 0000 |
| 2" | Partially Threaded | 1 1/8" | 5/8" | 21/64" | 180,000 | 5 | 90201A363 | 0000 |
| 3" | Partially Threaded | 1 1/8" | 5/8" | 21/64" | 180,000 | 5 | 90201A366 | 00000 |
| 4" | Partially Threaded | 1 1/8" | 5/8" | 21/64" | 180,000 | 1 | 90201A369 | 0000 |
1/2"-13 | ||||||||
| 1" | Fully Threaded | __ | 3/4" | 3/8" | 180,000 | 5 | 90201A415 | 0000 |
| 1 1/4" | Fully Threaded | __ | 3/4" | 3/8" | 180,000 | 5 | 90201A416 | 00000 |
| 1 1/2" | Fully Threaded | __ | 3/4" | 3/8" | 180,000 | 5 | 90201A418 | 00000 |
| 1 3/4" | Fully Threaded | __ | 3/4" | 3/8" | 180,000 | 5 | 90201A423 | 00000 |
| 2" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 5 | 90201A426 | 00000 |
| 2 1/2" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 5 | 90201A429 | 00000 |
| 3" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 5 | 90201A433 | 00000 |
| 3 1/2" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 1 | 90201A437 | 0000 |
| 4" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 1 | 90201A440 | 0000 |
| 4 1/2" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 1 | 90201A443 | 0000 |
| 5" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 1 | 90201A446 | 0000 |
| 6" | Partially Threaded | 1 1/4" | 3/4" | 3/8" | 180,000 | 1 | 90201A449 | 0000 |
5/8"-11 | ||||||||
| 1 1/2" | Fully Threaded | __ | 15/16" | 15/32" | 180,000 | 1 | 90201A525 | 0000 |
| 1 3/4" | Fully Threaded | __ | 15/16" | 15/32" | 180,000 | 1 | 90201A527 | 0000 |
| 2" | Fully Threaded | __ | 15/16" | 15/32" | 180,000 | 1 | 90201A531 | 0000 |
| 2 1/4" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 90201A535 | 0000 |
| 2 1/2" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 90201A536 | 0000 |
| 2 3/4" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 90201A537 | 0000 |
| 3" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 90201A539 | 0000 |
| 3 1/2" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 90201A541 | 0000 |
| 4" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 90201A544 | 0000 |
| 4 1/2" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 90201A547 | 0000 |
| 5" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 90201A550 | 0000 |
| 6" | Partially Threaded | 1 1/2" | 15/16" | 15/32" | 180,000 | 1 | 90201A553 | 0000 |
3/4"-10 | ||||||||
| 1 1/2" | Fully Threaded | __ | 1 1/8" | 9/16" | 180,000 | 1 | 90201A638 | 0000 |
| 2" | Fully Threaded | __ | 1 1/8" | 9/16" | 180,000 | 1 | 90201A640 | 0000 |
| 2 1/4" | Fully Threaded | __ | 1 1/8" | 9/16" | 180,000 | 1 | 90201A642 | 0000 |
| 2 1/2" | Fully Threaded | __ | 1 1/8" | 9/16" | 180,000 | 1 | 90201A644 | 0000 |
| 2 3/4" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 90201A646 | 0000 |
| 3" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 90201A648 | 0000 |
| 3 1/2" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 90201A651 | 0000 |
| 4" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 90201A654 | 00000 |
| 4 1/2" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 90201A657 | 00000 |
| 5" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 90201A660 | 00000 |
| 5 1/2" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 90201A663 | 00000 |
| 6" | Partially Threaded | 1 3/4" | 1 1/8" | 9/16" | 180,000 | 1 | 90201A667 | 00000 |
| 7" | Partially Threaded | 2" | 1 1/8" | 9/16" | 180,000 | 1 | 90201A670 | 00000 |
| 8" | Partially Threaded | 2" | 1 1/8" | 9/16" | 180,000 | 1 | 90201A674 | 00000 |
| 10" | Partially Threaded | 2" | 1 1/8" | 9/16" | 180,000 | 1 | 90201A678 | 00000 |
1"-8 | ||||||||
| 2" | Fully Threaded | __ | 1 1/2" | 3/4" | 180,000 | 1 | 90201A681 | 00000 |
| 3" | Fully Threaded | __ | 1 1/2" | 3/4" | 180,000 | 1 | 90201A682 | 00000 |
| 4" | Partially Threaded | 1 1/8" | 1 1/2" | 3/4" | 180,000 | 1 | 90201A683 | 00000 |
| 5" | Partially Threaded | 2 1/8" | 1 1/2" | 3/4" | 180,000 | 1 | 90201A684 | 00000 |
| 6" | Partially Threaded | 2 1/4" | 1 1/2" | 3/4" | 180,000 | 1 | 90201A685 | 00000 |