About Socket Head Screws
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Alloy Steel Socket Head Screws
With a tensile strength of 170,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. Length is measured from under the head.
Black-oxide steel screws are mildly corrosion resistant in dry environments. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance. They are not compatible with coarse threads.
Screws that meet ASTM A574, ASTM A574M, and ISO 898-1 comply with specifications and testing requirements for material quality.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing  | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
9/16"-18 | |||||||||||
Black-Oxide Alloy Steel | |||||||||||
| 3/4" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 3/4" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 2" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 2 1/2" | Partially Threaded | 1 1/2" | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
18-8 Stainless Steel Socket Head Screws
Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
Screws that meet ASME B1.1, ASME B18.3, ISO 21269, and ISO 4762 (formerly DIN 912) comply with standards for dimensions.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
9/16"-18 | |||||||||||
18-8 Stainless Steel | |||||||||||
| 1" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 70,000 | ASME B18.3 | 1 | 000000000 | 000000 |
| 1 1/2" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 70,000 | ASME B18.3 | 1 | 000000000 | 00000 |
| 2" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 70,000 | ASME B18.3 | 1 | 000000000 | 00000 |
| 2 1/2" | Partially Threaded | 1 1/2" | Fine | 27/32" | 9/16" | 7/16" | 70,000 | ASME B18.3 | 1 | 000000000 | 0000 |
| 3" | Partially Threaded | 1 1/2" | Fine | 27/32" | 9/16" | 7/16" | 70,000 | ASME B18.3 | 1 | 000000000 | 0000 |
| 3 1/2" | Partially Threaded | 1 1/2" | Fine | 27/32" | 9/16" | 7/16" | 70,000 | ASME B18.3 | 1 | 000000000 | 0000 |
| 4" | Partially Threaded | 1 1/2" | Fine | 27/32" | 9/16" | 7/16" | 70,000 | ASME B18.3 | 1 | 000000000 | 0000 |
| 5" | Partially Threaded | 1 1/2" | Fine | 27/32" | 9/16" | 7/16" | 70,000 | ASME B18.3 | 1 | 000000000 | 00000 |
| 6" | Partially Threaded | 1 1/2" | Fine | 27/32" | 9/16" | 7/16" | 70,000 | ASME B18.3 | 1 | 000000000 | 00000 |