Description
Overview
The GRK Fasteners 10221 Structural Screw (GRK10217) is designed for structural decking, framing, ledger board, LVL, multi-ply, and interior/exterior remodeling applications. Sold in a 500-count box, this 5/16 in. x 3-1/8 in. structural screw delivers a code-compliant fastening solution for demanding wood construction assemblies.
| Specification | Value |
|---|---|
| MPN | GRK10217 |
| Brand | GRK Fasteners / ITW Brands |
| Screw Size (Diameter) | 5/16 in. |
| Fastener Length | 3-1/8 in. (nominal); 2-1/2 in. (per manufacturer description) |
| Head Type | Round |
| Head Height | 0.177 in. |
| Drive Type | Star (T30) |
| Material | Steel |
| Finish | Climatek |
| Compatible Substrate | Wood |
| System of Measurement | Inch |
| Package Quantity | 500 count |
| Package Weight | 4.89 lb |
| Dimensional Standards / Certifications | ESR-2442, ICC-ES AC257 |
Technical Features
- Climatek Corrosion-Resistant Finish: Provides a proprietary protective coating on the steel shank, extending service life in exterior and exposed environments.
- Unique Thread Design with W-Cut Technology: The W-Cut thread geometry reduces friction during installation, enabling faster penetration into wood substrates and lowering required drive torque.
- T30 Star Drive: The T30 star drive recess maximizes bit engagement and reduces cam-out, supporting consistent installation under high-torque conditions.
- Round Head Profile (0.177 in. Height): The low-profile round head seats securely against the work surface, providing a clean bearing surface suitable for structural connections.
- ESR-2442 & ICC-ES AC257 Compliance: Listed under recognized engineering standards, supporting use in permitted structural applications where code-compliant fasteners are required.
- 500-Count Packaging: Bulk quantity format reduces restocking interruptions on large-scale framing and decking projects.
Applications
- Structural decking installations
- Wood framing assemblies
- Ledger board connections
- LVL (Laminated Veneer Lumber) fastening
- Multi-ply wood member construction
- Interior and exterior remodeling projects requiring structural fasteners
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