The GRK 5/16 in. x 4 in. Steel Washer-Head RSS Screws (100-Pack) are for use with pre-drilled hardware and as lag screw replacements. The screws are designed with a small shank to limit splitting and to provide strength.
Highlights:
- Bit size : #30
- Size : 5/16″ x 4″
- Built-in washer
- Climatek coated
- Sharp threads and points
- W-Cut thread design, Zip Tip
- Self-tapping specially hardened steel screw
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