Drive Pin Anchor Diameter 9/64 in Overall Length 1 1/4 in Thread Size Not Applicable Thread Length Not Applicable Anchor Material Steel Pin Material Steel Finish Zinc Plated Head Type Flat Head Diameter 0.25 in Nut Width Not Applicable Washer Outside Diameter 0.375 in Drill Bit Size Not Applicable Minimum Installation Depth 1 1/4 in Maximum Material Thickness Not Applicable Pin-Drive Anchor Type Fixed Nail-Drive Anchor System of Measurement Inch Compatible Material Concrete