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About Shoulder Screws
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Flat Head Shoulder Screws
These shoulder screws are angled under the head to sit flush in countersunk holes. Use them in structural and load-bearing applications, such as attaching panels to a surface. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. They have a standard shoulder with an undersized tolerance to fit most machinery and equipment.
For technical drawings and 3-D models, click on a part number.
Each | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Shoulder Lg. | Thread Size  | Thread Lg. | Head Dia. | Head Ht. | Material | Tensile Strength, psi | Drive Size | 1-4 | 5-Up | |
1/4" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/4" | 10-24 | 3/8" | 0.531" | 0.161" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 00000 | 00000 |
| 3/8" | 10-24 | 3/8" | 0.531" | 0.161" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
| 1/2" | 10-24 | 3/8" | 0.531" | 0.161" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
| 5/8" | 10-24 | 3/8" | 0.531" | 0.161" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
| 3/4" | 10-24 | 3/8" | 0.531" | 0.161" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 0000 | 0000 |
| 1" | 10-24 | 3/8" | 0.531" | 0.161" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 00000 | 0000 |
| 1 1/4" | 10-24 | 3/8" | 0.531" | 0.161" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 00000 | 00000 |
| 1 1/2" | 10-24 | 3/8" | 0.531" | 0.161" | 18-8 Stainless Steel | 70,000 | 5/32" | 000000000 | 00000 | 00000 |
5/16" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/4" | 1/4"-20 | 7/16" | 0.656" | 0.198" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 0000 | 0000 |
| 3/8" | 1/4"-20 | 7/16" | 0.656" | 0.198" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 0000 | 0000 |
| 1/2" | 1/4"-20 | 7/16" | 0.656" | 0.198" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 00000 | 0000 |
| 5/8" | 1/4"-20 | 7/16" | 0.656" | 0.198" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 00000 | 0000 |
| 3/4" | 1/4"-20 | 7/16" | 0.656" | 0.198" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 00000 | 0000 |
| 1" | 1/4"-20 | 7/16" | 0.656" | 0.198" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 00000 | 00000 |
| 1 1/4" | 1/4"-20 | 7/16" | 0.656" | 0.198" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 00000 | 00000 |
| 1 1/2" | 1/4"-20 | 7/16" | 0.656" | 0.198" | 18-8 Stainless Steel | 70,000 | 3/16" | 000000000 | 00000 | 00000 |
3/8" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 1/4" | 5/16"-18 | 1/2" | 0.781" | 0.234" | 18-8 Stainless Steel | 70,000 | 7/32" | 000000000 | 0000 | 0000 |
| 3/8" | 5/16"-18 | 1/2" | 0.781" | 0.234" | 18-8 Stainless Steel | 70,000 | 7/32" | 000000000 | 0000 | 0000 |
| 1/2" | 5/16"-18 | 1/2" | 0.781" | 0.234" | 18-8 Stainless Steel | 70,000 | 7/32" | 000000000 | 0000 | 0000 |
| 5/8" | 5/16"-18 | 1/2" | 0.781" | 0.234" | 18-8 Stainless Steel | 70,000 | 7/32" | 000000000 | 00000 | 0000 |
| 3/4" | 5/16"-18 | 1/2" | 0.781" | 0.234" | 18-8 Stainless Steel | 70,000 | 7/32" | 000000000 | 00000 | 0000 |
| 1" | 5/16"-18 | 1/2" | 0.781" | 0.234" | 18-8 Stainless Steel | 70,000 | 7/32" | 000000000 | 00000 | 00000 |
| 1 1/4" | 5/16"-18 | 1/2" | 0.781" | 0.234" | 18-8 Stainless Steel | 70,000 | 7/32" | 000000000 | 00000 | 00000 |
| 1 1/2" | 5/16"-18 | 1/2" | 0.781" | 0.234" | 18-8 Stainless Steel | 70,000 | 7/32" | 000000000 | 00000 | 00000 |
1/2" Shoulder Dia.—Standard Fit (-0.004" to -0.002" Dia. Tolerance) | ||||||||||
| 3/8" | 3/8"-16 | 5/8" | 0.937" | 0.251" | 18-8 Stainless Steel | 70,000 | 5/16" | 000000000 | 0000 | 0000 |
| 1/2" | 3/8"-16 | 5/8" | 0.937" | 0.251" | 18-8 Stainless Steel | 70,000 | 5/16" | 000000000 | 00000 | 0000 |
| 5/8" | 3/8"-16 | 5/8" | 0.937" | 0.251" | 18-8 Stainless Steel | 70,000 | 5/16" | 000000000 | 00000 | 00000 |
| 3/4" | 3/8"-16 | 5/8" | 0.937" | 0.251" | 18-8 Stainless Steel | 70,000 | 5/16" | 000000000 | 00000 | 00000 |
| 1" | 3/8"-16 | 5/8" | 0.937" | 0.251" | 18-8 Stainless Steel | 70,000 | 5/16" | 000000000 | 00000 | 00000 |
| 1 1/4" | 3/8"-16 | 5/8" | 0.937" | 0.251" | 18-8 Stainless Steel | 70,000 | 5/16" | 000000000 | 00000 | 00000 |
| 1 1/2" | 3/8"-16 | 5/8" | 0.937" | 0.251" | 18-8 Stainless Steel | 70,000 | 5/16" | 000000000 | 00000 | 00000 |
| 2" | 3/8"-16 | 5/8" | 0.937" | 0.251" | 18-8 Stainless Steel | 70,000 | 5/16" | 000000000 | 00000 | 00000 |
Steel Shoulder Screws for Binding Barrels
A shoulder adds strength to handle side or shear loads. Pair these screws with a barrel you already have or couple with a different barrel to create a custom fastener. A zinc plating provides corrosion resistance in wet environments. Screw length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Screw | Shoulder | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Head Dia. | Head Ht. | Screw Drive Style | Thread Lg. | Lg. | Dia. | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||||
8-32 | |||||||||
| 9/16" | 3/8" | 1/8" | Slotted/Phillips | 5/16" | 1/4" | 13/64" | 25 | 000000000 | 00000 |
10-24 | |||||||||
| 9/16" | 7/16" | 1/8" | Slotted/Phillips | 5/16" | 1/4" | 1/4" | 25 | 000000000 | 0000 |
1/4"-20 | |||||||||
| 7/16" | 9/16" | 5/32" | Slotted/Phillips | 5/16" | 1/8" | 5/16" | 10 | 000000000 | 00000 |
| 9/16" | 9/16" | 5/32" | Slotted/Phillips | 5/16" | 1/4" | 5/16" | 25 | 000000000 | 0000 |