Wedge Anchor System of Measurement Inch Anchor Diameter 1/4 in Thread Size 1/4 In.-20 Overall Length 3 1/4 in Thread Length 2 1/8 in Material Stainless Steel Material Grade/Class 18-8 Finish Plain Compatible Material Concrete Drill Bit Size 1/4 in Minimum Installation Depth 1 1/8 in Ultimate Tension Strength (4 000 psi Concrete) 1 870 lb Wedge Anchor Type Wedge Anchor Seismic Approved No ICC Approved for Cracked Concrete No ICC Approved for Un-Cracked Concrete No