GRK 12225 Rugged Structural Screw, 5/16" x 4"

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Self-tapping specially hardened steel screw, Sharp threads and points, climatek coated. W-Cut thread design, Zip Tip. Bit size : #30
SKU: 42915457
MFG: 12225
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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.


  • 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


MFR: 12225
SKU: 42915457
UPC: 772691122254
Brand: GRK Fasteners