12221 GRK SCREW RSS 5/16X3-1/8IN 100 pack
by Gap Power
SKU GRK12221
Original price
$66.00
-
Original price
$66.00
Original price
$66.00
$66.00
$66.00
-
$66.00
Current price
$66.00
In-Store Only — Visit us in Gap, PA to purchase
Overview
GRK No. 20 Structural Screws 12221 are designed for heavy-duty structural fastening applications in both interior and exterior environments.
| Model Number | 12221 |
|---|---|
| Brand | GRK Fasteners |
| Size | No. 20 x 3-1/8 in. L |
| Diameter | 5/16 in. |
| Weight | 7.55 lb (100-pack) |
| Material | Specially Hardened Steel |
| Finish | Climacoat |
| Package Quantity | 100 pieces |
| Drive Style | Star |
| Head Type | Washer Head |
Technical Features
- W-Cut thread design provides aggressive cutting action for faster installation and reduced driving torque
- Self-tapping capability eliminates the need for pre-drilling in most applications
- Self-drilling zip tip design penetrates materials efficiently without splitting
- Specially hardened steel construction delivers superior holding power for structural connections
- Built-in washer head distributes load over larger surface area to prevent pull-through
- Climacoat finish provides corrosion resistance for outdoor applications
- Sharp threads and points ensure secure engagement in wood and composite materials
- Driver bit included for immediate installation
Applications
- Carrying beams and structural connections
- Ledger board attachment
- Stair rail installation
- Deck post mounting
- Playground equipment assembly
- Professional construction and framing applications
- Interior and exterior structural fastening projects