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About Hex Head Screws and Bolts
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Super-Corrosion-Resistant High-Strength Bumax 88 Hex Head Screws
Fully Threaded
Partially Threaded
Choose these screws for their excellent corrosion resistance—comparable to 316 stainless steel—and the strength of steel. Use them for high-strength fastening in chemical and marine applications. Screws are nonmagnetic. Length is measured from under the head.
Screws that meet ASME B18.2.1 comply with specifications for dimensional standards.
For technical drawings and 3-D models, click on a part number.
Screws | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Head | Nuts | ||||||||||||
| Lg. | Threading | Min. Thread Lg. | Thread Spacing  | Wd. | Ht. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | Pkg. Qty. | Pkg. | ||
1/4"-20 | |||||||||||||
| 1/2" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 110,000 | ASME B18.2.1 | 5 | 000000000 | 000000 | __ | 000000 | 00 |
| 3/4" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 110,000 | ASME B18.2.1 | 5 | 000000000 | 0000 | __ | 000000 | 00 |
| 1" | Partially Threaded | 3/4" | Coarse | 7/16" | 5/32" | 110,000 | ASME B18.2.1 | 5 | 000000000 | 00000 | __ | 000000 | 00 |
| 1 1/4" | Partially Threaded | 3/4" | Coarse | 7/16" | 5/32" | 110,000 | ASME B18.2.1 | 5 | 000000000 | 00000 | __ | 000000 | 00 |
| 1 1/2" | Partially Threaded | 3/4" | Coarse | 7/16" | 5/32" | 110,000 | ASME B18.2.1 | 5 | 000000000 | 00000 | __ | 000000 | 00 |
| 2" | Partially Threaded | 3/4" | Coarse | 7/16" | 5/32" | 110,000 | ASME B18.2.1 | 5 | 000000000 | 00000 | __ | 000000 | 00 |
5/16"-18 | |||||||||||||
| 3/4" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 110,000 | ASME B18.2.1 | 5 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 110,000 | ASME B18.2.1 | 5 | 000000000 | 00000 | 1 | 000000000 | 0000 |
| 1 1/4" | Partially Threaded | 7/8" | Coarse | 1/2" | 13/64" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 7/8" | Coarse | 1/2" | 13/64" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
3/8"-16 | |||||||||||||
| 3/4" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
| 1 3/4" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
| 2" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
| 2 1/2" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
| 3" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 00000 | 1 | 000000000 | 0000 |
1/2"-13 | |||||||||||||
| 1" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 0000 | 1 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 1 3/4" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 2 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 3" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 3 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 4" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 110,000 | ASME B18.2.1 | 1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
Screws | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Head, mm | Nuts | |||||||||||
| Lg., mm | Threading | Thread Spacing | Wd. | Ht. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | Pkg. Qty. | Pkg. | ||
M6 × 1 mm | ||||||||||||
| 10 | Fully Threaded | Coarse | 10 | 4 | 110,000 | ISO 4017, DIN 933 | 10 | 000000000 | 000000 | 10 | 000000000 | 00000 |
| 12 | Fully Threaded | Coarse | 10 | 4 | 110,000 | ISO 4017, DIN 933 | 10 | 000000000 | 00000 | 10 | 000000000 | 0000 |
| 16 | Fully Threaded | Coarse | 10 | 4 | 110,000 | ISO 4017, DIN 933 | 10 | 000000000 | 00000 | 10 | 000000000 | 0000 |
| 20 | Fully Threaded | Coarse | 10 | 4 | 110,000 | ISO 4017, DIN 933 | 10 | 000000000 | 00000 | 10 | 000000000 | 0000 |
| 25 | Fully Threaded | Coarse | 10 | 4 | 110,000 | ISO 4017, DIN 933 | 10 | 000000000 | 00000 | 10 | 000000000 | 0000 |
| 30 | Fully Threaded | Coarse | 10 | 4 | 110,000 | ISO 4017, DIN 933 | 10 | 000000000 | 00000 | 10 | 000000000 | 0000 |
| 40 | Fully Threaded | Coarse | 10 | 4 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 00000 | 10 | 000000000 | 0000 |
M8 × 1.25 mm | ||||||||||||
| 16 | Fully Threaded | Coarse | 13 | 5.3 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 00000 | 5 | 000000000 | 0000 |
| 20 | Fully Threaded | Coarse | 13 | 5.3 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 00000 | 5 | 000000000 | 0000 |
| 25 | Fully Threaded | Coarse | 13 | 5.3 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 00000 | 5 | 000000000 | 0000 |
| 30 | Fully Threaded | Coarse | 13 | 5.3 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 00000 | 5 | 000000000 | 0000 |
| 35 | Fully Threaded | Coarse | 13 | 5.3 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 00000 | 5 | 000000000 | 0000 |
| 40 | Fully Threaded | Coarse | 13 | 5.3 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 00000 | 5 | 000000000 | 0000 |
| 50 | Fully Threaded | Coarse | 13 | 5.3 | 110,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 | 5 | 000000000 | 0000 |
M10 × 1.5 mm | ||||||||||||
| 25 | Fully Threaded | Coarse | 16 | 6.4 | 110,000 | ISO 4017 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
| 30 | Fully Threaded | Coarse | 16 | 6.4 | 110,000 | ISO 4017 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
| 35 | Fully Threaded | Coarse | 16 | 6.4 | 110,000 | ISO 4017 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
| 40 | Fully Threaded | Coarse | 16 | 6.4 | 110,000 | ISO 4017 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
| 50 | Fully Threaded | Coarse | 16 | 6.4 | 110,000 | ISO 4017 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
M12 × 1.75 mm | ||||||||||||
| 30 | Fully Threaded | Coarse | 18 | 7.5 | 110,000 | ISO 4017 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
| 35 | Fully Threaded | Coarse | 18 | 7.5 | 110,000 | ISO 4017 | 1 | 000000000 | 0000 | 1 | 000000000 | 0000 |
| 40 | Fully Threaded | Coarse | 18 | 7.5 | 110,000 | ISO 4017 | 1 | 000000000 | 00000 | 1 | 000000000 | 0000 |
| 50 | Fully Threaded | Coarse | 18 | 7.5 | 110,000 | ISO 4017 | 1 | 000000000 | 00000 | 1 | 000000000 | 0000 |