5/16-18 x 1-1/2 Drilltite Drill Screws: Hex Washer Head, Stalgard Finish, #3 point (1,000 Qty.)5 16 18 x 1 1 2" drill screw with 3 8" hex washer head. Drilltite dual processed drill points offer unequalled sharpness and positive drilling. #3 point drills material thicknesses up to . 220". Larger diameter provides higher shear and tensile strength values to meet the needs of more demanding applications. Stalgard corrosion resistant coating provides 1,000 hours of salt spray resistance (per ASTM B117). 5 16" hex drive. Specifications Description