Simpson Structural Screws SD9112R100 No.9 by 1-1/2-Inch Structural-Connector Screw, 100-Pack
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Feature
1/4-Inch Hex Head drive reduces cam-out for easier installationShank is specifically designed to match the fastener holes in Simpson Strong-Tie connectors
Optimized heat treated for strength
Mechanically-galvanized coating meets ASTM B695 class 55
Connectors installed with SD screw code listed under ICC-ES ESR-3096