Sleeve Anchor System of Measurement Inch Anchor Diameter 1/2 in Overall Length 2 1/4 in Thread Size 3/8 in Drive Type External Hex Head Type Hex Nut Width 0.5511 in Washer Outside Diameter 0.80511 in Material Steel Material Grade/Class Not Graded Finish Zinc Plated Drill Bit Size Not Applicable Compatible Material Block Concrete Masonry Minimum Installation Torque Not Applicable Maximum Installation Torque Not Applicable Minimum Installation Depth 1 7/8 in