Expansion Anchor Anchor Diameter 1/2 in Overall Length 1 in Screw Size 1/4 in Thread Size 1/4 in Thread Depth 1 in Thread Type Coarse Material Zinc Alloy Finish Plain Drill Bit Size 1/2 in Minimum Installation Depth 1 7/8 in Ultimate Shear Strength (4 000 psi Concrete) 1 450 lb Maximum Ultimate Shear Strength 1 450 lb Ultimate Tension Strength (4 000 psi Concrete) 1 000 lb Maximum Ultimate Tension Strength 1 000 lb System of Measurement Inch