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Hex Cap Screw — 5/16 in. x 3 in., Stainless Steel, Silver, Box, 5-Pack
- Mfg.#
- 4221-J
- Sku#
- 6331359
- Features a hex cap screw head designed for wrench or socket use
- Suitable for outdoor applications with a stainless steel finish
- Base material is steel with a corrosion-resistant stainless finish
- Sized 5/16"-24 x 3" for SAE fine-thread fastening applications
- Diameter 5/16 inch and length 3 inch for medium-length connections
* Estimated stock levels as of Sat, Apr 11, 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 Silver Hex Hex Cap Screw is a sturdy, outdoor-rated fastener designed for projects that need a reliable hex-head connection. Finished in stainless steel with a steel base, it offers the look and durability suited to exterior structures where a fine-thread hold is required. The 5/16"-24 SAE fine threads and 3" length make it a good choice for joining thicker components or securing hardware on decks, railings, gates, and outdoor furniture. The hex cap head lets you apply firm torque with a wrench for tight, positive clamping, while the silver finish keeps a clean, professional appearance on visible assemblies. Use it wherever a long, fine-threaded screw is needed for outdoor construction or repair.
Specifications
General
| Base Material | Steel |
|---|---|
| Color | Silver |
| Finish | Stainless Steel |
| Head Style | Hex |
| Indoor/Outdoor | Outdoor |
| Pack Qty | 5 |
| Point Type | Blunt |
| Thread Type | SAE Fine |
| Thread per Inch | 24 |
| Type | Hex Cap Screw |
Dimensions
| Diameter | 5/16 in |
|---|---|
| Length | 3 in |
| Size | 5/16"-24 x 3" |
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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