Threading Threading |
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![]() | Partially Threaded |
![]() | Fully Threaded |
DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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About Hex Head Screws and Bolts
More
Low-Strength Grade A Steel Square Head Screws

Partially Threaded

Fully Threaded
About half the strength of medium-strength screws, these screws can be used for light duty fastening applications, such as securing access panels. Large flat sides make them easy to grip with a wrench and keep them from rotating in square holes. Material meets ASTM A307 specifications for quality. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Screws | ||||||||||||
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Head | Nuts | |||||||||||
Lg. | Threading | Min. Thread Lg. | Thread Spacing | Wd. | Ht. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | Pkg. | ||
ASTM Grade A Steel | ||||||||||||
1/4"-20 | ||||||||||||
1" | Partially Threaded | 3/4" | Coarse | 3/8" | 11/64" | 60,000 | ASTM A307 | 25 | 000000000 | 00000 | 000000000 | 000000 |
1 1/4" | Partially Threaded | 3/4" | Coarse | 3/8" | 11/64" | 60,000 | ASTM A307 | 25 | 000000000 | 00000 | 000000000 | 00000 |
1 1/2" | Partially Threaded | 3/4" | Coarse | 3/8" | 11/64" | 60,000 | ASTM A307 | 50 | 000000000 | 00000 | 000000000 | 00000 |
2" | Partially Threaded | 3/4" | Coarse | 3/8" | 11/64" | 60,000 | ASTM A307 | 25 | 000000000 | 00000 | 000000000 | 00000 |
5/16"-18 | ||||||||||||
3/4" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 60,000 | ASTM A307 | 25 | 000000000 | 00000 | 000000000 | 00000 |
1" | Partially Threaded | 7/8" | Coarse | 1/2" | 13/64" | 60,000 | ASTM A307 | 25 | 000000000 | 00000 | 000000000 | 00000 |
1 1/4" | Partially Threaded | 7/8" | Coarse | 1/2" | 13/64" | 60,000 | ASTM A307 | 25 | 000000000 | 00000 | 000000000 | 00000 |
1 1/2" | Partially Threaded | 7/8" | Coarse | 1/2" | 13/64" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
2" | Partially Threaded | 7/8" | Coarse | 1/2" | 13/64" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
3" | Partially Threaded | 7/8" | Coarse | 1/2" | 13/64" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
4" | Partially Threaded | 7/8" | Coarse | 1/2" | 13/64" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
3/8"-16 | ||||||||||||
1" | Fully Threaded | __ | Coarse | 9/16" | 1/4" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
1 1/4" | Partially Threaded | 1" | Coarse | 9/16" | 1/4" | 60,000 | ASTM A307 | 10 | 000000000 | 0000 | 000000000 | 00000 |
1 1/2" | Partially Threaded | 1" | Coarse | 9/16" | 1/4" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
1 3/4" | Partially Threaded | 1" | Coarse | 9/16" | 1/4" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
2" | Partially Threaded | 1" | Coarse | 9/16" | 1/4" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
2 1/2" | Partially Threaded | 1" | Coarse | 9/16" | 1/4" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
3" | Partially Threaded | 1" | Coarse | 9/16" | 1/4" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
3 1/2" | Partially Threaded | 1" | Coarse | 9/16" | 1/4" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
1/2"-13 | ||||||||||||
1" | Fully Threaded | __ | Coarse | 3/4" | 21/64" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
1 1/2" | Fully Threaded | __ | Coarse | 3/4" | 21/64" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
1 3/4" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 21/64" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 21/64" | 60,000 | ASTM A307 | 10 | 000000000 | 00000 | 000000000 | 00000 |
2 1/4" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 21/64" | 60,000 | ASTM A307 | 5 | 000000000 | 00000 | 000000000 | 00000 |
2 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 21/64" | 60,000 | ASTM A307 | 5 | 000000000 | 00000 | 000000000 | 00000 |
3" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 21/64" | 60,000 | ASTM A307 | 5 | 000000000 | 00000 | 000000000 | 00000 |
3 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 21/64" | 60,000 | ASTM A307 | 5 | 000000000 | 00000 | 000000000 | 00000 |
4" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 21/64" | 60,000 | ASTM A307 | 5 | 000000000 | 00000 | 000000000 | 00000 |
5" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 21/64" | 60,000 | ASTM A307 | 5 | 000000000 | 00000 | 000000000 | 00000 |
6" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 21/64" | 60,000 | ASTM A307 | 5 | 000000000 | 00000 | 000000000 | 00000 |
8" | Partially Threaded | 1 1/2" | Coarse | 3/4" | 21/64" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
5/8"-11 | ||||||||||||
2" | Partially Threaded | 1 1/2" | Coarse | 15/16" | 27/64" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
2 1/2" | Partially Threaded | 1 1/2" | Coarse | 15/16" | 27/64" | 60,000 | ASTM A307 | 5 | 000000000 | 00000 | 000000000 | 00000 |
3" | Partially Threaded | 1 1/2" | Coarse | 15/16" | 27/64" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
3 1/2" | Partially Threaded | 1 1/2" | Coarse | 15/16" | 27/64" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
4" | Partially Threaded | 1 1/2" | Coarse | 15/16" | 27/64" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
4 1/2" | Partially Threaded | 1 1/2" | Coarse | 15/16" | 27/64" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
5" | Partially Threaded | 1 1/2" | Coarse | 15/16" | 27/64" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
6" | Partially Threaded | 1 1/2" | Coarse | 15/16" | 27/64" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
7" | Partially Threaded | 1 3/4" | Coarse | 15/16" | 27/64" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
11" | Partially Threaded | 1 3/4" | Coarse | 15/16" | 27/64" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
3/4"-10 | ||||||||||||
2 1/2" | Partially Threaded | 1 3/4" | Coarse | 1 1/8" | 1/2" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
3" | Partially Threaded | 1 3/4" | Coarse | 1 1/8" | 1/2" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
3 3/4" | Partially Threaded | 1 3/4" | Coarse | 1 1/8" | 1/2" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
4" | Partially Threaded | 1 3/4" | Coarse | 1 1/8" | 1/2" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
4 1/2" | Partially Threaded | 1 3/4" | Coarse | 1 1/8" | 1/2" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
5" | Partially Threaded | 1 3/4" | Coarse | 1 1/8" | 1/2" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
5 1/2" | Partially Threaded | 1 3/4" | Coarse | 1 1/8" | 1/2" | 60,000 | ASTM A307 | 1 | 000000000 | 00000 | 000000000 | 00000 |
6" | Partially Threaded | 1 3/4" | Coarse | 1 1/8" | 1/2" | 60,000 | ASTM A307 | 1 | 000000000 | 00000 | 000000000 | 00000 |
7" | Partially Threaded | 2" | Coarse | 1 1/8" | 1/2" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
8" | Partially Threaded | 2" | Coarse | 1 1/8" | 1/2" | 60,000 | ASTM A307 | 1 | 000000000 | 00000 | 000000000 | 00000 |
9" | Partially Threaded | 2" | Coarse | 1 1/8" | 1/2" | 60,000 | ASTM A307 | 1 | 000000000 | 0000 | 000000000 | 00000 |
10" | Partially Threaded | 2" | Coarse | 1 1/8" | 1/2" | 60,000 | ASTM A307 | 1 | 000000000 | 00000 | 000000000 | 00000 |
12" | Partially Threaded | 2" | Coarse | 1 1/8" | 1/2" | 60,000 | ASTM A307 | 1 | 000000000 | 00000 | 000000000 | 00000 |
1"-8 | ||||||||||||
6" | Partially Threaded | 2 1/4" | Coarse | 1 1/2" | 21/32" | 60,000 | ASTM A307 | 1 | 000000000 | 00000 | 000000000 | 00000 |
7" | Partially Threaded | 2 1/2" | Coarse | 1 1/2" | 21/32" | 60,000 | ASTM A307 | 1 | 000000000 | 00000 | 000000000 | 00000 |
9" | Partially Threaded | 2 1/2" | Coarse | 1 1/2" | 21/32" | 60,000 | ASTM A307 | 1 | 000000000 | 00000 | 000000000 | 00000 |
10" | Partially Threaded | 2 1/2" | Coarse | 1 1/2" | 21/32" | 60,000 | ASTM A307 | 1 | 000000000 | 00000 | 000000000 | 00000 |