Threading Threading |
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 | Fully Threaded |
 | Partially Threaded |
DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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About Hex Head Screws and Bolts
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High-Strength Steel Hex Head Screws with Material Certification
Fully Threaded
Partially Threaded
These screws come with a traceable lot number and a physical and chemical test report. Made from Grade 8 steel, they can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. The zinc yellow-chromate plating resists corrosion in wet environments. Material meets SAE J429 specifications for quality. Dimensions meet ASME B18.2.1 specifications. Grade 8 steel hex head screws are marked with six radial lines. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Wd. | Ht. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Grade 8 Steel | ||||||||||
1/4"-20 | ||||||||||
| 1/2" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 150,000 | ASME B18.2.1, SAE J429 | 50 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 150,000 | ASME B18.2.1, SAE J429 | 50 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 150,000 | ASME B18.2.1, SAE J429 | 50 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 150,000 | ASME B18.2.1, SAE J429 | 50 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 150,000 | ASME B18.2.1, SAE J429 | 25 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 150,000 | ASME B18.2.1, SAE J429 | 25 | 000000000 | 00000 |
| 2" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 0000 |
5/16"-18 | ||||||||||
| 3/4" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 150,000 | ASME B18.2.1, SAE J429 | 50 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 150,000 | ASME B18.2.1, SAE J429 | 25 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 2" | Partially Threaded | 7/8" | Coarse | 1/2" | 13/64" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 0000 |
3/8"-16 | ||||||||||
| 3/4" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 150,000 | ASME B18.2.1, SAE J429 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 1 3/4" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 2" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 2 1/2" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 150,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 0000 |
| 3" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 150,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 0000 |
1/2"-13 | ||||||||||
| 1" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 1 3/4" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 2" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 2 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 150,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 00000 |
| 3" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 150,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 00000 |
| 3 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 150,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 00000 |
| 4" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 150,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 00000 |
5/8"-11 | ||||||||||
| 1 1/2" | Fully Threaded | __ | Coarse | 15/16" | 25/64" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 0000 |
| 2" | Fully Threaded | __ | Coarse | 15/16" | 25/64" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 0000 |
| 2 1/2" | Partially Threaded | 1 1/2" | Coarse | 15/16" | 25/64" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 0000 |
| 3" | Partially Threaded | 1 1/2" | Coarse | 15/16" | 25/64" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 0000 |
3/4"-10 | ||||||||||
| 1 1/2" | Fully Threaded | __ | Coarse | 1 1/8" | 15/32" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 0000 |
| 2" | Fully Threaded | __ | Coarse | 1 1/8" | 15/32" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 0000 |
| 2 1/2" | Fully Threaded | __ | Coarse | 1 1/8" | 15/32" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 0000 |
| 3" | Partially Threaded | 1 3/4" | Coarse | 1 1/8" | 15/32" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 0000 |