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Extreme-Strength 718 Nickel Hex Head Screws
Fully Threaded
Partially Threaded
More than twice as strong as screws made of 400 nickel, these 718 nickel screws can handle the same extreme stress as our strongest steel screws. They hold up in the harshest environments, such as cryogenic systems, oil rigs, and nuclear reactors. Chromium and molybdenum are mixed with their nickel base to maximize strength, corrosion resistance, and temperature resistance. These screws withstand salt water and harsh acids, such as nitric or sulfuric acid, and you can use them in temperatures as low as -425° F. They’re also known as Inconel 718 screws. All meet ASME or DIN specifications for dimensions. Length is measured from under the head. Use them with 718 nickel nuts (sold separately) and washers.
Screws | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Head | Nuts | ||||||||||||
| Lg. | Threading | Min. Thread Lg. | Thread Spacing  | Wd. | Ht. | Temperature Range, °F | Tensile Strength, psi | Specifications Met | Each | Pkg. Qty. | Pkg. | ||
1/4"-20 | |||||||||||||
| 1/2" | Fully Threaded | __ | Coarse | 7/16" | 11/64" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 000000 | 1 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 7/16" | 11/64" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 0000 |
| 1" | Partially Threaded | 3/4" | Coarse | 7/16" | 11/64" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 3/4" | Coarse | 7/16" | 11/64" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 0000 |
| 2" | Partially Threaded | 3/4" | Coarse | 7/16" | 11/64" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 0000 |
3/8"-16 | |||||||||||||
| 1" | Fully Threaded | __ | Coarse | 9/16" | 1/4" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 1 1/2" | Partially Threaded | 1" | Coarse | 9/16" | 1/4" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 2" | Partially Threaded | 1" | Coarse | 9/16" | 1/4" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 2 1/2" | Partially Threaded | 1" | Coarse | 9/16" | 1/4" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 3" | Partially Threaded | 1" | Coarse | 9/16" | 1/4" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
1/2"-13 | |||||||||||||
| 1" | Fully Threaded | __ | Coarse | 3/4" | 11/32" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 1 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 11/32" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 11/32" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 2 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 11/32" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 3" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 11/32" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 3 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 11/32" | -425° to 1800° | 185,000 | ASME B18.2.1 | 000000000 | 00000 | 1 | 000000000 | 00000 |
M6 × 1 mm | |||||||||||||
| 16mm | Fully Threaded | __ | Coarse | 10mm | 4.2mm | -425° to 1800° | 185,000 | DIN 931, DIN 933 | 000000000 | 00000 | 1 | 000000000 | 0000 |
| 20mm | Fully Threaded | __ | Coarse | 10mm | 4.2mm | -425° to 1800° | 185,000 | DIN 931, DIN 933 | 000000000 | 00000 | 1 | 000000000 | 0000 |
| 25mm | Fully Threaded | __ | Coarse | 10mm | 4.2mm | -425° to 1800° | 185,000 | DIN 931, DIN 933 | 000000000 | 00000 | 1 | 000000000 | 0000 |
| 30mm | Partially Threaded | 18mm | Coarse | 10mm | 4.2mm | -425° to 1800° | 185,000 | DIN 931, DIN 933 | 000000000 | 00000 | 1 | 000000000 | 0000 |
M8 × 1.25 mm | |||||||||||||
| 16mm | Fully Threaded | __ | Coarse | 13mm | 5.5mm | -425° to 1800° | 185,000 | DIN 931, DIN 933 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 20mm | Fully Threaded | __ | Coarse | 13mm | 5.5mm | -425° to 1800° | 185,000 | DIN 931, DIN 933 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 25mm | Fully Threaded | __ | Coarse | 13mm | 5.5mm | -425° to 1800° | 185,000 | DIN 931, DIN 933 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 30mm | Fully Threaded | __ | Coarse | 13mm | 5.5mm | -425° to 1800° | 185,000 | DIN 931, DIN 933 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 40mm | Partially Threaded | 22mm | Coarse | 13mm | 5.5mm | -425° to 1800° | 185,000 | DIN 931, DIN 933 | 000000000 | 00000 | 1 | 000000000 | 00000 |
| 50mm | Partially Threaded | 22mm | Coarse | 13mm | 5.5mm | -425° to 1800° | 185,000 | DIN 931, DIN 933 | 000000000 | 00000 | 1 | 000000000 | 00000 |