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 1/4 in Material Stainless Steel Material Grade/Class 316 Finish Plain Compatible Material Concrete Drill Bit Size 1/4 in Minimum Installation Depth 1 1/8 in Minimum Material Thickness Not Applicable Nut Width 0.4375 in Washer Outside Diameter 0.625 in Wedge Anchor Type Wedge Anchor Seismic Approved No ICC Approved for Cracked Concrete No