About Socket Head Screws
More
Aluminum Socket Head Screws
Fully Threaded
Partially Threaded
Aluminum screws are one-third the weight of steel and have good corrosion resistance. Length is measured from under the head.
Screws with a blue-anodized finish are easy to distinguish.
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.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Dia. | Ht. | Drive Size | Pkg. Qty. | Pkg. | |
7075 Aluminum | ||||||||
2-56 | ||||||||
| 1/8" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 000000 |
| 3/16" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
| 1/4" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
| 5/16" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
4-40 | ||||||||
| 3/16" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 1/4" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 5/16" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 5 | 000000000 | 00000 |
6-32 | ||||||||
| 1/4" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 5/16" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
M3 | ||||||||
| 6mm | Fully Threaded | Coarse | 5.68mm | 3mm | 2.5 mm | 10 | 000000000 | 00000 |
| 8mm | Fully Threaded | Coarse | 5.68mm | 3mm | 2.5 mm | 10 | 000000000 | 00000 |
| 10mm | Fully Threaded | Coarse | 5.68mm | 3mm | 2.5 mm | 10 | 000000000 | 00000 |
| 12mm | Fully Threaded | Coarse | 5.68mm | 3mm | 2.5 mm | 10 | 000000000 | 00000 |
| 16mm | Fully Threaded | Coarse | 5.68mm | 3mm | 2.5 mm | 10 | 000000000 | 00000 |
| 20mm | Fully Threaded | Coarse | 5.68mm | 3mm | 2.5 mm | 10 | 000000000 | 00000 |
M4 | ||||||||
| 8mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
| 10mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
| 12mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
| 14mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
| 16mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
| 20mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
M5 | ||||||||
| 10mm | Fully Threaded | Coarse | 8.72mm | 5mm | 4 mm | 10 | 000000000 | 00000 |
| 16mm | Fully Threaded | Coarse | 8.72mm | 5mm | 4 mm | 5 | 000000000 | 00000 |
Blue-Anodized 7075 Aluminum | ||||||||
2-56 | ||||||||
| 1/8" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
| 3/16" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
| 1/4" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
4-40 | ||||||||
| 3/16" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 1/4" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 5/16" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 5 | 000000000 | 00000 |
6-32 | ||||||||
| 1/4" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
M4 | ||||||||
| 8mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
| 10mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
| 12mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Pkg. Qty. | Pkg. | |
2024 Aluminum | |||||||||
8-32 | |||||||||
| 1/4" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 5 | 000000000 | 000000 |
| 3/8" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 5 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 1 | 000000000 | 0000 |
| 1 1/4" | Partially Threaded | 7/8" | Coarse | 0.27" | 0.164" | 9/64" | 5 | 000000000 | 00000 |
10-32 | |||||||||
| 1/4" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
| 1 1/4" | Partially Threaded | 7/8" | Fine | 5/16" | 0.19" | 5/32" | 5 | 000000000 | 00000 |
10-24 | |||||||||
| 3/8" | Fully Threaded | __ | Coarse | 5/16" | 0.19" | 5/32" | 5 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Coarse | 5/16" | 0.19" | 5/32" | 5 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | Coarse | 5/16" | 0.19" | 5/32" | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 5/16" | 0.19" | 5/32" | 5 | 000000000 | 00000 |
1/4"-28 | |||||||||
| 3/4" | Fully Threaded | __ | Fine | 3/8" | 1/4" | 3/16" | 5 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Fine | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |
1/4"-20 | |||||||||
| 3/8" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 5 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1" | Coarse | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |
| 1 3/4" | Partially Threaded | 1" | Coarse | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |
| 2 1/2" | Partially Threaded | 1" | Coarse | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |
Blue-Anodized 2024 Aluminum | |||||||||
8-32 | |||||||||
| 1/4" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 5 | 000000000 | 00000 |
| 3/8" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 5 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 1 | 000000000 | 0000 |
10-32 | |||||||||
| 1/4" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
1/4"-20 | |||||||||
| 3/8" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 5 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1" | Coarse | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |
Aluminum Shoulder Screws
One-third the weight of steel, aluminum shoulder screws are lightweight and have good corrosion resistance. A standard shoulder with an undersized tolerance allows them to fit most machinery and equipment. They’re often used to guide or align components, and as an axle or pivot point.
For technical drawings and 3-D models, click on a part number.
Each | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Shoulder Lg. | Thread Size | Thread Lg. | Head Dia. | Head Ht. | Tensile Strength, psi | Drive Size | Specifications Met | 1-4 | 5-Up | |
1/8" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/8" | 4-40 | 5/32" | 1/4" | 1/8" | 40,000 | 5/64" | __ | 000000000 | 00000 | 00000 |
| 3/16" | 4-40 | 5/32" | 1/4" | 1/8" | 40,000 | 5/64" | __ | 000000000 | 0000 | 0000 |
| 1/4" | 4-40 | 5/32" | 1/4" | 1/8" | 40,000 | 5/64" | __ | 000000000 | 0000 | 0000 |
| 5/16" | 4-40 | 5/32" | 1/4" | 1/8" | 40,000 | 5/64" | __ | 000000000 | 0000 | 0000 |
| 3/8" | 4-40 | 5/32" | 1/4" | 1/8" | 40,000 | 5/64" | __ | 000000000 | 0000 | 0000 |
| 1/2" | 4-40 | 5/32" | 1/4" | 1/8" | 40,000 | 5/64" | __ | 000000000 | 0000 | 0000 |
3/16" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/8" | 8-32 | 3/16" | 5/16" | 5/32" | 40,000 | 3/32" | __ | 000000000 | 0000 | 0000 |
| 3/16" | 8-32 | 3/16" | 5/16" | 5/32" | 40,000 | 3/32" | __ | 000000000 | 0000 | 0000 |
| 1/4" | 8-32 | 3/16" | 5/16" | 5/32" | 40,000 | 3/32" | __ | 000000000 | 0000 | 0000 |
| 5/16" | 8-32 | 3/16" | 5/16" | 5/32" | 40,000 | 3/32" | __ | 000000000 | 0000 | 0000 |
| 3/8" | 8-32 | 3/16" | 5/16" | 5/32" | 40,000 | 3/32" | __ | 000000000 | 0000 | 0000 |
| 1/2" | 8-32 | 3/16" | 5/16" | 5/32" | 40,000 | 3/32" | __ | 000000000 | 0000 | 0000 |
| 3/4" | 8-32 | 3/16" | 5/16" | 5/32" | 40,000 | 3/32" | __ | 000000000 | 0000 | 0000 |
| 1" | 8-32 | 3/16" | 5/16" | 5/32" | 40,000 | 3/32" | __ | 000000000 | 0000 | 0000 |
1/4" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/4" | 10-24 | 3/8" | 3/8" | 3/16" | 40,000 | 1/8" | ASME B18.3 | 000000000 | 0000 | 0000 |
| 3/8" | 10-24 | 3/8" | 3/8" | 3/16" | 40,000 | 1/8" | ASME B18.3 | 000000000 | 0000 | 0000 |
| 1/2" | 10-24 | 3/8" | 3/8" | 3/16" | 40,000 | 1/8" | ASME B18.3 | 000000000 | 0000 | 0000 |
| 3/4" | 10-24 | 3/8" | 3/8" | 3/16" | 40,000 | 1/8" | ASME B18.3 | 000000000 | 0000 | 0000 |
| 1" | 10-24 | 3/8" | 3/8" | 3/16" | 40,000 | 1/8" | ASME B18.3 | 000000000 | 0000 | 0000 |