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About Shoulder Screws
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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 |