Spax Full thread Flat Head Screw - Patented Multi-head design featuring ribs on the underside of the head for a clean, flush or countersunk penetration into wood, sheet metal, masonry and plastics. These are coarse thread screws, made of carbon steel, available in a silver zinc or yellow zinc finish (more sizes available in silver). Thread serrations reduce the torque required to fully drive these screws. For use with either a Phillips or Square Drive bit. Self drilling/self tapping.

Important Note - This size is now a "dropship only" item and must be purchased in Master Cartons as listed (either five 1 lb boxes or three 5 lb boxes). These screws will ship directly from Spax and screw/lag bolt orders must be $200+ to avoid small order surcharges from the manufacturer.