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About Hex Head Screws and Bolts
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Choose a hex head fastener with the right threading, thread size, material, and strength for your equipment.
Steel Hex Head Screws
 |  |
Partially Threaded | Class 8.8 |
Our most popular hex head screws. These have a head with six flat sides to keep wrenches and sockets from slipping and rounding off the drive.
Length is measured from under the head.
Medium-Strength Fastener—Your go-to screws for fastening most machinery and equipment. They have tensile strengths from 90,000 to 120,000 psi.
Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
Head, mm | Small Pack | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Lg., mm | Wd. | Ht. | Threading | Thread Spacing | Fastener Strength Grade/Class | Tensile Strength, psi | Pkg. Qty. | Pkg. | |||
Medium-Strength Zinc-Plated Steel | |||||||||||
M8 × 1 mm | |||||||||||
| 40 | 13 | 5.3 | Partially Threaded | Fine | Class 8.8 | 110,000 | 25 | 91180A542 | 000000 | ||
| 45 | 13 | 5.3 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A544 | 0000 | ||
| 50 | 13 | 5.3 | Partially Threaded | Fine | Class 8.8 | 110,000 | 25 | 91180A546 | 00000 | ||
| 55 | 13 | 5.3 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A548 | 0000 | ||
| 60 | 13 | 5.3 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A550 | 0000 | ||
| 70 | 13 | 5.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91280A021 | 00000 | ||
| 80 | 13 | 5.3 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A407 | 00000 | ||
| 100 | 13 | 5.3 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A559 | 0000 | ||
M10 × 1.25 mm | |||||||||||
| 35 | 17 | 6.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A635 | 00000 | ||
| 40 | 17 | 6.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A638 | 00000 | ||
| 45 | 17 | 6.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A640 | 00000 | ||
| 50 | 17 | 6.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A642 | 00000 | ||
| 55 | 17 | 6.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A643 | 00000 | ||
| 60 | 17 | 6.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A644 | 00000 | ||
| 65 | 17 | 6.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A646 | 00000 | ||
| 70 | 17 | 6.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A649 | 00000 | ||
| 75 | 17 | 6.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 5 | 91180A652 | 00000 | ||
| 80 | 17 | 6.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A654 | 00000 | ||
| 90 | 17 | 6.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 5 | 91180A658 | 0000 | ||
| 100 | 17 | 6.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 5 | 91180A662 | 00000 | ||
| 110 | 17 | 6.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A663 | 00000 | ||
| 120 | 17 | 6.4 | Partially Threaded | Fine | Class 8.8 | 110,000 | 5 | 91180A664 | 00000 | ||
M10 × 1 mm | |||||||||||
| 40 | 17 | 6.4 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 10 | 91180A620 | 00000 | ||
| 45 | 17 | 6.4 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 10 | 91180A622 | 00000 | ||
| 50 | 17 | 6.4 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 10 | 91180A625 | 00000 | ||
| 60 | 17 | 6.4 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 5 | 91180A627 | 00000 | ||
| 80 | 17 | 6.4 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 5 | 91180A632 | 00000 | ||
| 100 | 17 | 6.4 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 5 | 91180A415 | 00000 | ||
M12 × 1.5 mm | |||||||||||
| 40 | 19 | 7.5 | Partially Threaded | Fine | Class 8.8 | 110,000 | 5 | 91180A750 | 00000 | ||
| 50 | 19 | 7.5 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A753 | 00000 | ||
| 55 | 19 | 7.5 | Partially Threaded | Fine | Class 8.8 | 110,000 | 5 | 91180A754 | 00000 | ||
| 60 | 19 | 7.5 | Partially Threaded | Fine | Class 8.8 | 110,000 | 10 | 91180A755 | 00000 | ||
| 65 | 19 | 7.5 | Partially Threaded | Fine | Class 8.8 | 110,000 | 5 | 91180A756 | 00000 | ||
| 70 | 19 | 7.5 | Partially Threaded | Fine | Class 8.8 | 110,000 | 5 | 91180A757 | 00000 | ||
| 75 | 19 | 7.5 | Partially Threaded | Fine | Class 8.8 | 110,000 | 5 | 91180A758 | 00000 | ||
| 80 | 19 | 7.5 | Partially Threaded | Fine | Class 8.8 | 110,000 | 5 | 91180A760 | 00000 | ||
| 90 | 19 | 7.5 | Partially Threaded | Fine | Class 8.8 | 110,000 | 5 | 91180A762 | 00000 | ||
| 100 | 19 | 7.5 | Partially Threaded | Fine | Class 8.8 | 110,000 | 5 | 91180A765 | 00000 | ||
M12 × 1.25 mm | |||||||||||
| 40 | 19 | 7.5 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 5 | 91180A715 | 00000 | ||
| 45 | 19 | 7.5 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 10 | 91180A717 | 00000 | ||
| 50 | 19 | 7.5 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 10 | 91180A724 | 00000 | ||
| 55 | 19 | 7.5 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 5 | 91180A726 | 00000 | ||
| 60 | 19 | 7.5 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 10 | 91180A728 | 00000 | ||
| 65 | 19 | 7.5 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 5 | 91180A730 | 00000 | ||
| 70 | 19 | 7.5 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 5 | 91180A731 | 00000 | ||
| 75 | 19 | 7.5 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 5 | 91180A733 | 00000 | ||
| 80 | 19 | 7.5 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 5 | 91180A735 | 00000 | ||
| 90 | 19 | 7.5 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 5 | 91180A737 | 00000 | ||
| 100 | 19 | 7.5 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 5 | 91180A719 | 00000 | ||
| 110 | 19 | 7.5 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 5 | 91180A721 | 00000 | ||
| 120 | 19 | 7.5 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 1 | 91180A723 | 0000 | ||
M14 × 1.5 mm | |||||||||||
| 45 | 22 | 8.8 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A785 | 0000 | ||
| 50 | 22 | 8.8 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A788 | 0000 | ||
| 60 | 22 | 8.8 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A790 | 0000 | ||
| 65 | 22 | 8.8 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A791 | 0000 | ||
| 70 | 22 | 8.8 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A792 | 0000 | ||
| 80 | 22 | 8.8 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A794 | 0000 | ||
| 90 | 22 | 8.8 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A798 | 0000 | ||
| 100 | 22 | 8.8 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A795 | 0000 | ||
| 120 | 22 | 8.8 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A802 | 0000 | ||
M16 × 1.5 mm | |||||||||||
| 50 | 24 | 10 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A814 | 0000 | ||
| 55 | 24 | 10.2 | Partially Threaded | Fine | Class 8.8 | 110,000 | 5 | 91280A024 | 00000 | ||
| 60 | 24 | 10 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A818 | 0000 | ||
| 70 | 24 | 10 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A822 | 0000 | ||
| 80 | 24 | 10 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A826 | 0000 | ||
| 90 | 24 | 10.2 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91280A025 | 0000 | ||
| 100 | 24 | 10 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91180A830 | 0000 | ||
| 120 | 24 | 10.2 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91280A026 | 0000 | ||
M18 × 1.5 mm | |||||||||||
| 65 | 27 | 11.7 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91280A028 | 0000 | ||
| 70 | 27 | 11.7 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91280A029 | 0000 | ||
| 80 | 27 | 11.7 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91280A030 | 0000 | ||
| 90 | 27 | 11.7 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91280A031 | 0000 | ||
| 100 | 27 | 11.7 | Partially Threaded | Fine | Class 8.8 | 110,000 | 1 | 91280A032 | 0000 | ||
M20 × 1.5 mm | |||||||||||
| 80 | 30 | 12.7 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 1 | 91280A035 | 0000 | ||
| 100 | 30 | 12.7 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 1 | 91280A036 | 0000 | ||
| 120 | 30 | 12.7 | Partially Threaded | Extra Fine | Class 8.8 | 110,000 | 1 | 91280A037 | 0000 | ||
