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GRK Fasteners
5/16-Inch x 3-1/8-Inch RSS™ Black Structural Screws
- Mfg.#
- 95312
- Sku#
- 4160578
- Black coating matches decorative hardware for a cohesive looking deck build
- Integrated washer head for maximum clamping force
- Unique thread design draws two substrates together while its washer head allows zero gap joints
- For use in heavy-duty structural applications and deck substructures as a replacement for lag screws and other remodeling applications
* Estimated stock levels as of Sun, Mar 15, 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
RSS black structural screws are designed for outdoor and decking applications. The black coating provides a bold finish for structural connections.
Specifications
General
| Applicable Materials | Wood |
|---|---|
| Color | Black |
| Color Family | Black / Gray |
| Drive Size | 5/16 in |
| Drive Type | Torx |
| Driver Bit Size | 5/16 in |
| Finish | Zinc-Plated |
| Grade | SAE |
| Head Type | Washer |
| Material | Steel |
| Pack Qty | 25 |
| Shear Strength | 123592 psi |
| Tensile Strength | 178051 psi |
| Thread Length | 1.61 in |
| Thread Type | Coarse |
| Type | Structural Screw |
Dimensions
| Length | 3-1/8 in |
|---|
Manufacturing Details
The following information is subject to change without notice
| Shop USA | No |
|---|
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