Expansion Shield Anchor Diameter 1/2 in Overall Length 1 1/4 in Screw Size 1/4 in Thread Size 1/4 in Thread Depth 1.25 in Thread Type Coarse Material Zinc Alloy Finish Plain Drill Bit Size 1/2 in Minimum Installation Depth 1 1/4 in Ultimate Shear Strength (4 000 psi Concrete) 2 100 lb Maximum Ultimate Shear Strength 2 100 lb Ultimate Tension Strength (4 000 psi Concrete) 2 320 lb Maximum Ultimate Tension Strength 2 320 lb System of Measurement Inch