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Steel 12-Point Screws
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Fully Threaded | Partially Threaded |
Good for high-strength fastening, these screws are made from steel comparable in strength to Grade 9 steel. Use them for heavy duty stamping applications as well as earth-moving machinery, such as bulldozers and excavators. The head makes 12 points of contact with a wrench to handle more torque than a socket head or hex head screw. The flange distributes pressure where the screw meets the surface, eliminating the need for a separate washer. To install, use a 12-point wrench that matches the head width of your screw.
Head | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Threading | Min. Thread Lg. | Thread Spacing | Wd. | Ht. | Flange Dia. | Tensile Strength, psi | Specs. Met | Material | Pkg. Qty. | Pkg. | |||
1/4"-20 | ||||||||||||||
| 1/2" | Fully Threaded | — | Coarse | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 50 | 91271A537 | 000000 | ||
| 5/8" | Fully Threaded | — | Coarse | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 50 | 91271A539 | 00000 | ||
| 3/4" | Fully Threaded | — | Coarse | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 50 | 91271A540 | 00000 | ||
| 7/8" | Fully Threaded | — | Coarse | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 50 | 91271A541 | 00000 | ||
| 1" | Fully Threaded | — | Coarse | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 50 | 91271A542 | 00000 | ||
| 1 1/4" | Fully Threaded | — | Coarse | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 50 | 91271A544 | 00000 | ||
| 1 1/2" | Partially Threaded | 1" | Coarse | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 50 | 91271A546 | 00000 | ||
| 1 3/4" | Partially Threaded | 1" | Coarse | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A547 | 0000 | ||
| 2" | Partially Threaded | 1" | Coarse | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A550 | 00000 | ||
| 2 1/2" | Partially Threaded | 1" | Coarse | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A548 | 0000 | ||
| 3" | Partially Threaded | 1" | Coarse | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A558 | 00000 | ||
1/4"-28 | ||||||||||||||
| 3/4" | Fully Threaded | — | Fine | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 50 | 91271A570 | 00000 | ||
| 1" | Fully Threaded | — | Fine | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 50 | 91271A572 | 00000 | ||
| 1 1/4" | Fully Threaded | — | Fine | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 50 | 91271A573 | 00000 | ||
| 1 1/2" | Partially Threaded | 1" | Fine | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 50 | 91271A574 | 00000 | ||
| 1 3/4" | Partially Threaded | 1" | Fine | 1/4" | 1/4" | 3/8" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A575 | 00000 | ||
5/16"-18 | ||||||||||||||
| 1/2" | Fully Threaded | — | Coarse | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A580 | 0000 | ||
| 3/4" | Fully Threaded | — | Coarse | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 50 | 91271A581 | 00000 | ||
| 7/8" | Fully Threaded | — | Coarse | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 50 | 91271A584 | 00000 | ||
| 1" | Fully Threaded | — | Coarse | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A583 | 00000 | ||
| 1 1/4" | Fully Threaded | — | Coarse | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A585 | 00000 | ||
| 1 1/2" | Fully Threaded | — | Coarse | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A587 | 00000 | ||
| 1 3/4" | Partially Threaded | 1 1/8" | Coarse | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A589 | 00000 | ||
| 2" | Partially Threaded | 1 1/8" | Coarse | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A591 | 00000 | ||
| 2 1/2" | Partially Threaded | 1 1/8" | Coarse | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A593 | 00000 | ||
5/16"-24 | ||||||||||||||
| 3/4" | Fully Threaded | — | Fine | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A605 | 0000 | ||
| 7/8" | Fully Threaded | — | Fine | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A606 | 00000 | ||
| 1" | Fully Threaded | — | Fine | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A607 | 00000 | ||
| 1 1/4" | Fully Threaded | — | Fine | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A609 | 00000 | ||
| 1 1/2" | Fully Threaded | — | Fine | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A611 | 00000 | ||
| 2" | Partially Threaded | 1 1/8" | Fine | 5/16" | 5/16" | 15/32" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A613 | 00000 | ||
3/8"-16 | ||||||||||||||
| 3/4" | Fully Threaded | — | Coarse | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A622 | 00000 | ||
| 7/8" | Fully Threaded | — | Coarse | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A623 | 00000 | ||
| 1" | Fully Threaded | — | Coarse | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A624 | 00000 | ||
| 1 1/4" | Fully Threaded | — | Coarse | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A626 | 00000 | ||
| 1 1/2" | Fully Threaded | — | Coarse | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A628 | 00000 | ||
| 1 3/4" | Partially Threaded | 1 1/4" | Coarse | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A630 | 00000 | ||
| 2" | Partially Threaded | 1 1/4" | Coarse | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A632 | 00000 | ||
| 2 1/4" | Partially Threaded | 1 1/4" | Coarse | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A633 | 0000 | ||
| 2 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A634 | 00000 | ||
| 3" | Partially Threaded | 1 1/4" | Coarse | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A636 | 00000 | ||
| 3 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A638 | 00000 | ||
3/8"-24 | ||||||||||||||
| 1" | Fully Threaded | — | Fine | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A641 | 00000 | ||
| 1 1/4" | Fully Threaded | — | Fine | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A644 | 00000 | ||
| 1 1/2" | Fully Threaded | — | Fine | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 25 | 91271A646 | 00000 | ||
| 1 3/4" | Partially Threaded | 1 1/4" | Fine | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A647 | 0000 | ||
| 2" | Partially Threaded | 1 1/4" | Fine | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A648 | 00000 | ||
| 2 1/2" | Partially Threaded | 1 1/4" | Fine | 3/8" | 3/8" | 9/16" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A650 | 00000 | ||
7/16"-14 | ||||||||||||||
| 1" | Fully Threaded | — | Coarse | 7/16" | 7/16" | 21/32" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A901 | 00000 | ||
| 1 1/4" | Fully Threaded | — | Coarse | 7/16" | 7/16" | 21/32" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A671 | 00000 | ||
| 1 1/2" | Fully Threaded | — | Coarse | 7/16" | 7/16" | 21/32" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A673 | 00000 | ||
| 2" | Partially Threaded | 1 3/8" | Coarse | 7/16" | 7/16" | 21/32" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A677 | 00000 | ||
| 2 1/4" | Partially Threaded | 1 3/8" | Coarse | 7/16" | 7/16" | 21/32" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A678 | 00000 | ||
| 2 1/2" | Partially Threaded | 1 3/8" | Coarse | 7/16" | 7/16" | 21/32" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A679 | 00000 | ||
1/2"-13 | ||||||||||||||
| 1" | Fully Threaded | — | Coarse | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A712 | 00000 | ||
| 1 1/4" | Fully Threaded | — | Coarse | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A714 | 00000 | ||
| 1 1/2" | Fully Threaded | — | Coarse | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A716 | 00000 | ||
| 1 3/4" | Fully Threaded | — | Coarse | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A718 | 00000 | ||
| 2" | Fully Threaded | — | Coarse | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A720 | 00000 | ||
| 2 1/4" | Partially Threaded | 1 1/2" | Coarse | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A721 | 0000 | ||
| 2 1/2" | Partially Threaded | 1 1/2" | Coarse | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A723 | 0000 | ||
| 3" | Partially Threaded | 1 1/2" | Coarse | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A724 | 0000 | ||
| 3 1/2" | Partially Threaded | 1 1/2" | Coarse | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A726 | 00000 | ||
| 4" | Partially Threaded | 1 1/2" | Coarse | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A728 | 00000 | ||
| 5" | Partially Threaded | 1 1/2" | Coarse | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A732 | 00000 | ||
1/2"-20 | ||||||||||||||
| 1" | Fully Threaded | — | Fine | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A758 | 00000 | ||
| 1 1/4" | Fully Threaded | — | Fine | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A759 | 00000 | ||
| 1 1/2" | Fully Threaded | — | Fine | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 10 | 91271A760 | 00000 | ||
| 1 3/4" | Fully Threaded | — | Fine | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A761 | 0000 | ||
| 2" | Fully Threaded | — | Fine | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A765 | 0000 | ||
| 2 1/4" | Partially Threaded | 1 1/2" | Fine | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A767 | 00000 | ||
| 2 1/2" | Partially Threaded | 1 1/2" | Fine | 1/2" | 1/2" | 3/4" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A770 | 0000 | ||
5/8"-11 | ||||||||||||||
| 1 1/4" | Fully Threaded | — | Coarse | 5/8" | 5/8" | 15/16" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A798 | 00000 | ||
| 1 1/2" | Fully Threaded | — | Coarse | 5/8" | 5/8" | 15/16" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A799 | 0000 | ||
| 1 3/4" | Fully Threaded | — | Coarse | 5/8" | 5/8" | 15/16" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A800 | 0000 | ||
| 2" | Fully Threaded | — | Coarse | 5/8" | 5/8" | 15/16" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A802 | 0000 | ||
| 2 1/4" | Fully Threaded | — | Coarse | 5/8" | 5/8" | 15/16" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A803 | 00000 | ||
| 2 1/2" | Partially Threaded | 1 3/4" | Coarse | 5/8" | 5/8" | 15/16" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A804 | 00000 | ||
| 2 3/4" | Partially Threaded | 1 3/4" | Coarse | 5/8" | 5/8" | 15/16" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A805 | 00000 | ||
| 3" | Partially Threaded | 1 3/4" | Coarse | 5/8" | 5/8" | 15/16" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A806 | 00000 | ||
| 3 1/2" | Partially Threaded | 1 3/4" | Coarse | 5/8" | 5/8" | 15/16" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A808 | 00000 | ||
| 4" | Partially Threaded | 1 3/4" | Coarse | 5/8" | 5/8" | 15/16" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A810 | 00000 | ||
5/8"-18 | ||||||||||||||
| 1 1/2" | Fully Threaded | — | Fine | 5/8" | 5/8" | 15/16" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A818 | 0000 | ||
| 2" | Fully Threaded | — | Fine | 5/8" | 5/8" | 15/16" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A820 | 00000 | ||
3/4"-10 | ||||||||||||||
| 1 1/2" | Fully Threaded | — | Coarse | 3/4" | 3/4" | 1 1/8" | 170,000 | IFI-115 | Alloy Steel | 5 | 91271A841 | 00000 | ||
| 2" | Fully Threaded | — | Coarse | 3/4" | 3/4" | 1 1/8" | 170,000 | IFI-115 | Alloy Steel | 1 | 91271A843 | 0000 | ||
| 2 1/2" | Fully Threaded | — | Coarse | 3/4" | 3/4" | 1 1/8" | 170,000 | IFI-115 | Alloy Steel | 1 | 91271A845 | 0000 | ||
| 3" | Partially Threaded | 2" | Coarse | 3/4" | 3/4" | 1 1/8" | 170,000 | IFI-115 | Alloy Steel | 1 | 91271A847 | 0000 | ||
| 3 1/2" | Partially Threaded | 2" | Coarse | 3/4" | 3/4" | 1 1/8" | 170,000 | IFI-115 | Alloy Steel | 1 | 91271A849 | 0000 | ||
| 4" | Partially Threaded | 2" | Coarse | 3/4" | 3/4" | 1 1/8" | 170,000 | IFI-115 | Alloy Steel | 1 | 91271A851 | 0000 | ||
