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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.
Fiberglass Flanged Hex Head Screws
 |  |
Fully Threaded | Partially Threaded |
The best strength-to-weight ratio of our nonmetal flanged hex head screws. These fiberglass screws hold up in high-stress applications without adding weight to your assembly. They resist acids, solvents, oil, and salt water. The flange spreads pressure over a wide area to protect thin and soft materials. These screws have a head with six flat sides to keep wrenches and sockets from slipping and rounding off the drive.
Head height includes the flange. Length is measured from under the flange.
Head | Gray | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Wd. | Ht. | Flange Dia. | Threading | Thread Spacing | Tensile Strength | Temp. | Pkg. Qty. | Pkg. | |||
High-Strength Lightweight Fiberglass | ||||||||||||
1/4"-20 | ||||||||||||
| 1/2" | 3/8" | 9/32" | 9/16" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A680 | 000000 | ||
| 5/8" | 3/8" | 9/32" | 9/16" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A682 | 00000 | ||
| 3/4" | 3/8" | 9/32" | 9/16" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A684 | 00000 | ||
| 7/8" | 3/8" | 9/32" | 9/16" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A686 | 00000 | ||
| 1" | 3/8" | 9/32" | 9/16" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A688 | 00000 | ||
| 1 1/4" | 3/8" | 9/32" | 9/16" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A690 | 0000 | ||
| 1 1/2" | 3/8" | 9/32" | 9/16" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A692 | 0000 | ||
3/8"-16 | ||||||||||||
| 1/2" | 9/16" | 25/64" | 51/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A694 | 00000 | ||
| 5/8" | 9/16" | 25/64" | 51/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A101 | 00000 | ||
| 3/4" | 9/16" | 25/64" | 51/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A698 | 00000 | ||
| 7/8" | 9/16" | 25/64" | 51/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A699 | 00000 | ||
| 1" | 9/16" | 25/64" | 51/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A700 | 0000 | ||
| 1 1/4" | 9/16" | 25/64" | 51/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A701 | 0000 | ||
| 1 1/2" | 9/16" | 25/64" | 51/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A702 | 00000 | ||
| 2" | 9/16" | 25/64" | 51/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A102 | 0000 | ||
| 2" | 9/16" | 25/64" | 51/64" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A703 | 00000 | ||
| 2 1/2" | 9/16" | 25/64" | 51/64" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A704 | 00000 | ||
| 3" | 9/16" | 25/64" | 51/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A103 | 00000 | ||
| 3" | 9/16" | 25/64" | 51/64" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A705 | 00000 | ||
| 4" | 9/16" | 25/64" | 51/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A104 | 0000 | ||
| 4 1/2" | 9/16" | 25/64" | 51/64" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A105 | 0000 | ||
1/2"-13 | ||||||||||||
| 3/4" | 3/4" | 1/2" | 1 1/16" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A706 | 00000 | ||
| 1" | 3/4" | 1/2" | 1 1/16" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A707 | 0000 | ||
| 1 1/4" | 3/4" | 1/2" | 1 1/16" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A714 | 0000 | ||
| 1 1/2" | 3/4" | 1/2" | 1 1/16" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A716 | 0000 | ||
| 2" | 3/4" | 1/2" | 1 1/16" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A720 | 00000 | ||
| 2 1/2" | 3/4" | 1/2" | 1 1/16" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A722 | 00000 | ||
| 3" | 3/4" | 1/2" | 1 1/16" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A724 | 0000 | ||
| 3 1/2" | 3/4" | 1/2" | 1 1/16" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A726 | 0000 | ||
| 4" | 3/4" | 1/2" | 1 1/16" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A728 | 0000 | ||
| 5" | 3/4" | 1/2" | 1 1/16" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A106 | 0000 | ||
| 6" | 3/4" | 1/2" | 1 1/16" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A107 | 0000 | ||
Fiberglass Hex Head Screws
 |  |
Fully Threaded | Partially Threaded |
The best strength-to-weight ratio of our nonmetal hex head screws, these are used in high-stress applications where weight matters. They resist acids, solvents, oil, and salt water. The head's six flat sides keep wrenches and sockets from slipping and rounding off the drive.
Length is measured from under the head.
Head | Gray | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Wd. | Ht. | Threading | Thread Spacing | Tensile Strength | Temp. | Pkg. Qty. | Pkg. | |||
High-Strength Lightweight Fiberglass | |||||||||||
1/4"-20 | |||||||||||
| 1/2" | 7/16" | 13/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A552 | 000000 | ||
| 3/4" | 7/16" | 13/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A554 | 00000 | ||
| 1" | 7/16" | 13/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A556 | 00000 | ||
| 1 1/4" | 7/16" | 13/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A558 | 00000 | ||
| 1 1/2" | 7/16" | 13/64" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A560 | 0000 | ||
5/16"-18 | |||||||||||
| 1 1/2" | 1/2" | 7/32" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A582 | 00000 | ||
| 2" | 1/2" | 7/32" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A584 | 0000 | ||
3/8"-16 | |||||||||||
| 1 1/2" | 9/16" | 1/4" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 10 | 91345A628 | 00000 | ||
| 2" | 9/16" | 1/4" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A632 | 0000 | ||
| 2 1/2" | 9/16" | 1/4" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A634 | 00000 | ||
| 3" | 9/16" | 1/4" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A636 | 00000 | ||
5/8"-11 | |||||||||||
| 1 1/2" | 15/16" | 13/32" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A640 | 00000 | ||
| 2" | 15/16" | 13/32" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 5 | 91345A642 | 00000 | ||
| 2 1/2" | 15/16" | 13/32" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A644 | 0000 | ||
| 3" | 15/16" | 13/32" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A646 | 0000 | ||
| 3 1/2" | 15/16" | 13/32" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A648 | 0000 | ||
| 4" | 15/16" | 13/32" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A650 | 0000 | ||
| 5" | 15/16" | 13/32" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A655 | 00000 | ||
3/4"-10 | |||||||||||
| 1 1/2" | 1 1/8" | 15/32" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A660 | 0000 | ||
| 2" | 1 1/8" | 15/32" | Fully Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A662 | 0000 | ||
| 2 1/2" | 1 1/8" | 15/32" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A664 | 0000 | ||
| 3" | 1 1/8" | 15/32" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A666 | 0000 | ||
| 4" | 1 1/8" | 15/32" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A670 | 0000 | ||
| 5" | 1 1/8" | 15/32" | Partially Threaded | Coarse | Not Rated | -60° F to 190° F | 1 | 91345A675 | 0000 | ||
