About Socket Head Screws
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Brass-Tip Alloy Steel Socket Head Screws


Electrically conductive and soft enough to grip textured and curved surfaces, the nonmarring brass tip reduces damage from metal-on-metal contact. Screws are alloy steel; they have a tensile strength of 180,000 psi and are stronger than Grade 8 steel screws. Their black-oxide finish provides mild corrosion resistance in dry environments. All meet ASME B18.3 and ASTM A574 for dimensional standards and material quality.
Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
Head | Tip | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Dia. | Lg. | Tensile Strength, psi | Specifications Met | Each | |
Black-Oxide Alloy Steel | ||||||||||||
6-32 | ||||||||||||
3/8" | Fully Threaded | __ | Coarse | 0.226" | 0.138" | 7/64" | 1/16" | 1/32" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 00000 |
1/2" | Fully Threaded | __ | Coarse | 0.226" | 0.138" | 7/64" | 1/16" | 1/32" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
8-32 | ||||||||||||
3/8" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 3/32" | 3/64" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1/2" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 3/32" | 3/64" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
3/4" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 3/32" | 3/64" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
10-32 | ||||||||||||
3/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 3/32" | 3/64" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1/2" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 3/32" | 3/64" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
5/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 3/32" | 3/64" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
3/4" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 3/32" | 3/64" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 3/32" | 3/64" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1/4"-20 | ||||||||||||
1/2" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1/8" | 1/16" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
5/8" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1/8" | 1/16" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
3/4" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1/8" | 1/16" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1/8" | 1/16" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1 1/4" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1/8" | 1/16" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1 1/2" | Partially Threaded | 3/4" | Coarse | 3/8" | 1/4" | 3/16" | 1/8" | 1/16" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
5/16"-18 | ||||||||||||
3/4" | Fully Threaded | __ | Coarse | 15/32" | 5/16" | 1/4" | 3/16" | 3/32" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1" | Fully Threaded | __ | Coarse | 15/32" | 5/16" | 1/4" | 3/16" | 3/32" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1 1/2" | Fully Threaded | __ | Coarse | 15/32" | 5/16" | 1/4" | 3/16" | 3/32" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
3/8"-16 | ||||||||||||
3/4" | Fully Threaded | __ | Coarse | 9/16" | 3/8" | 5/16" | 3/16" | 3/32" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1" | Fully Threaded | __ | Coarse | 9/16" | 3/8" | 5/16" | 3/16" | 3/32" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1 1/4" | Fully Threaded | __ | Coarse | 9/16" | 3/8" | 5/16" | 3/16" | 3/32" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1 1/2" | Fully Threaded | __ | Coarse | 9/16" | 3/8" | 5/16" | 3/16" | 3/32" | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
Nylon-Tip Alloy Steel Socket Head Screws


Nonconductive and softer than brass, the nylon tip reduces vibration and eliminates damage from metal touching metal. Screws are alloy steel with a tensile strength of 180,000 psi, making them stronger than Grade 8 steel screws. Their black-oxide finish provides mild corrosion resistance in dry environments. All meet ASME B18.3 and ASTM A574 for dimensional standards and material quality.
Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
Head | Tip | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Dia. | Lg. | Temp. Range, °F | Tensile Strength, psi | Specifications Met | Each | |
Black-Oxide Alloy Steel | |||||||||||||
6-32 | |||||||||||||
3/8" | Fully Threaded | __ | Coarse | 0.226" | 0.138" | 7/64" | 1/16" | 1/32" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 00000 |
1/2" | Fully Threaded | __ | Coarse | 0.226" | 0.138" | 7/64" | 1/16" | 1/32" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
8-32 | |||||||||||||
3/8" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 3/32" | 3/64" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1/2" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 3/32" | 3/64" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
3/4" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 3/32" | 3/64" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
10-32 | |||||||||||||
3/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 3/32" | 3/64" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1/2" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 3/32" | 3/64" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
5/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 3/32" | 3/64" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
3/4" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 3/32" | 3/64" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 3/32" | 3/64" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1/4"-20 | |||||||||||||
1/2" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1/8" | 1/16" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
5/8" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1/8" | 1/16" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
3/4" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1/8" | 1/16" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1/8" | 1/16" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1 1/4" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1/8" | 1/16" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1 1/2" | Partially Threaded | 3/4" | Coarse | 3/8" | 1/4" | 3/16" | 1/8" | 1/16" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
3/8"-16 | |||||||||||||
3/4" | Fully Threaded | __ | Coarse | 9/16" | 3/8" | 5/16" | 3/16" | 3/32" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1" | Fully Threaded | __ | Coarse | 9/16" | 3/8" | 5/16" | 3/16" | 3/32" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1 1/4" | Fully Threaded | __ | Coarse | 9/16" | 3/8" | 5/16" | 3/16" | 3/32" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1 1/2" | Fully Threaded | __ | Coarse | 9/16" | 3/8" | 5/16" | 3/16" | 3/32" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
5/16"-18 | |||||||||||||
3/4" | Fully Threaded | __ | Coarse | 15/32" | 5/16" | 1/4" | 3/16" | 3/32" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1" | Fully Threaded | __ | Coarse | 15/32" | 5/16" | 1/4" | 3/16" | 3/32" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |
1 1/2" | Fully Threaded | __ | Coarse | 15/32" | 5/16" | 1/4" | 3/16" | 3/32" | -50° to 250° | 180,000 | ASME B18.3, ASTM A574 | 000000000 | 0000 |