Simpson Structural Screws SD9112R500 No.9 by 1-1/2-Inch Structural-Connector Screw， 500-Pack</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>1/4-Inch Hex Head drive reduces cam-out for easier installation</li><li>Shank is specifically designed to match the fastener holes in Simpson Strong-Tie connectors</li><li>Optimized heat treated for strength</li><li>Mechanically-galvanized coating meets ASTM B695 class 55</li><li>Connectors installed with SD screw code listed under ICC-ES ESR-3096</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/41STwTbmJIL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/21-StyqxkqL.jpg' noproxy></br>