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Black Plain Socket Set Screws — 5/16 in. Dia. x 1/4 in. L, 20-Pack
- Mfg.#
- 4661
- Sku#
- 6387526
* Estimated stock levels as of Wed, Jun 17, 2026. All items subject to prior sale. Prices may vary between stores and online. Please call ahead to confirm availability of items marked as Limited Stock.
Description
This is a black socket set screw designed for fastening components where a flush, unobtrusive hold is needed, and it’s ideal when you want a clean, low-profile connection. Machined from steel with a plain black finish, the 5/16"-18 x 1/4" size and USS coarse threading provide reliable engagement in mating parts, making it a go-to for securing pulleys, collars, gears, and shaft-mounted components. Its short 1/4-inch length works well in tight-depth applications such as machinery adjustments, small motor assemblies, and furniture or fixture repairs where protruding fasteners would be undesirable. The socket drive allows for positive installation and removal in confined spaces, and the robust steel construction delivers dependable holding power for light-to-medium duty mechanical and maintenance tasks.
Specifications
General
| Color | Black |
|---|---|
| Drive Style | Socket |
| Finish | Plain |
| Material | Steel |
| Pack Qty | 20 |
| Thread Type | USS Coarse |
| Thread per Inch | 18 |
| Type | Socket Set Screw |
Dimensions
| Diameter | 5/16" |
|---|---|
| Length | 1/4 in |
| Size | 5/16"-18 x 1/4" |
Manufacturing Details
The following information is subject to change without notice
| Prop 65 Warning |
WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov
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