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| Right Hand | Left Hand |
System of Measurement System of Measurement |
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Material Material |
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Head Type Head Type |
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Drive Style Drive Style |
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Socket Head Profile Socket Head Profile |
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Hardness Hardness |
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Minimum Shear Strength Minimum Shear Strength |
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Thread Fit Thread Fit |
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Tensile Strength Tensile Strength |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Thread Spacing Thread Spacing |
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Head Texture Head Texture |
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 | Knurled |
Thread Type Thread Type |
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Shoulder Fit Shoulder Fit |
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About Shoulder Screws
More
Left-Hand Threaded Shoulder Screws
Tighten these shoulder screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. 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.
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| Shoulder Lg. | Thread Size | Thread Lg. | Head Dia. | Head Ht. | Material | Tensile Strength, psi | Drive Size | 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" | 18-8 Stainless Steel | 70,000 | 5/64" | 000000000 | 00000 | 00000 |
| 3/16" | 4-40 | 5/32" | 1/4" | 1/8" | 18-8 Stainless Steel | 70,000 | 5/64" | 000000000 | 0000 | 0000 |
| 1/4" | 4-40 | 5/32" | 1/4" | 1/8" | 18-8 Stainless Steel | 70,000 | 5/64" | 000000000 | 0000 | 0000 |
| 3/8" | 4-40 | 5/32" | 1/4" | 1/8" | 18-8 Stainless Steel | 70,000 | 5/64" | 000000000 | 0000 | 0000 |
| 1/2" | 4-40 | 5/32" | 1/4" | 1/8" | 18-8 Stainless Steel | 70,000 | 5/64" | 000000000 | 0000 | 0000 |
5/32" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/8" | 6-32 | 3/16" | 9/32" | 1/8" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 3/16" | 6-32 | 3/16" | 9/32" | 1/8" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 1/4" | 6-32 | 3/16" | 9/32" | 1/8" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 3/8" | 6-32 | 3/16" | 9/32" | 1/8" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 1/2" | 6-32 | 3/16" | 9/32" | 1/8" | 18-8 Stainless Steel | 70,000 | 3/32" | 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" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 3/16" | 8-32 | 3/16" | 5/16" | 5/32" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 1/4" | 8-32 | 3/16" | 5/16" | 5/32" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 3/8" | 8-32 | 3/16" | 5/16" | 5/32" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 1/2" | 8-32 | 3/16" | 5/16" | 5/32" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 3/4" | 8-32 | 3/16" | 5/16" | 5/32" | 18-8 Stainless Steel | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 1" | 8-32 | 3/16" | 5/16" | 5/32" | 18-8 Stainless Steel | 70,000 | 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" | 18-8 Stainless Steel | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 3/8" | 10-24 | 3/8" | 3/8" | 3/16" | 18-8 Stainless Steel | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 1/2" | 10-24 | 3/8" | 3/8" | 3/16" | 18-8 Stainless Steel | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 5/8" | 10-24 | 3/8" | 3/8" | 3/16" | 18-8 Stainless Steel | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 3/4" | 10-24 | 3/8" | 3/8" | 3/16" | 18-8 Stainless Steel | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 1" | 10-24 | 3/8" | 3/8" | 3/16" | 18-8 Stainless Steel | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
5/16" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/4" | 1/4"-20 | 7/16" | 7/16" | 7/32" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
| 3/8" | 1/4"-20 | 7/16" | 7/16" | 7/32" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
| 1/2" | 1/4"-20 | 7/16" | 7/16" | 7/32" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
| 5/8" | 1/4"-20 | 7/16" | 7/16" | 7/32" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
| 3/4" | 1/4"-20 | 7/16" | 7/16" | 7/32" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
| 1" | 1/4"-20 | 7/16" | 7/16" | 7/32" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
3/8" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/2" | 5/16"-18 | 1/2" | 9/16" | 1/4" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 0000 | 0000 |
| 3/4" | 5/16"-18 | 1/2" | 9/16" | 1/4" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 0000 | 0000 |
| 1" | 5/16"-18 | 1/2" | 9/16" | 1/4" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 0000 | 0000 |
| 1 1/2" | 5/16"-18 | 1/2" | 9/16" | 1/4" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 0000 | 0000 |
| 2" | 5/16"-18 | 1/2" | 9/16" | 1/4" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 0000 | 0000 |
1/2" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/2" | 3/8"-16 | 5/8" | 3/4" | 5/16" | 18-8 Stainless Steel | 70,000 | 1/4" | 000000000 | 0000 | 0000 |
| 3/4" | 3/8"-16 | 5/8" | 3/4" | 5/16" | 18-8 Stainless Steel | 70,000 | 1/4" | 000000000 | 0000 | 0000 |
| 1" | 3/8"-16 | 5/8" | 3/4" | 5/16" | 18-8 Stainless Steel | 70,000 | 1/4" | 000000000 | 0000 | 0000 |
| 1 1/2" | 3/8"-16 | 5/8" | 3/4" | 5/16" | 18-8 Stainless Steel | 70,000 | 1/4" | 000000000 | 0000 | 0000 |
| 2" | 3/8"-16 | 5/8" | 3/4" | 5/16" | 18-8 Stainless Steel | 70,000 | 1/4" | 000000000 | 00000 | 0000 |