Expansion Shield Anchor Diameter 7/8 in Overall Length 2 1/4 in Screw Size 1/2 in Thread Size 1/2 In.-13 Thread Depth 2.25 in Thread Type Coarse Material Zinc Alloy Finish Plain Drill Bit Size 7/8 in Minimum Installation Depth 2 1/4 in Ultimate Shear Strength (4 000 psi Concrete) 8 100 lb Maximum Ultimate Shear Strength 8 100 lb Ultimate Tension Strength (4 000 psi Concrete) 5 100 lb Maximum Ultimate Tension Strength 5 100 lb System of Measurement Inch