Simpson Strong Tie SDS25312-R10 1/4" x 3-1/2" Hex Head Wood Screw 10 per Package 1/4" x 3-1/2" SDS Screw, 2-1/4" Thread Length 10 per Pack 4CUT tip reduces install torque & makes driving easier with no predrilling & minimal wood splitting Double-barrier coating finish provides corrosion resistance superior to hot-dip galvanization 3/8" hex washer head stamped w/No-Equal sign & fastener length for easy identification after install