Wedge Anchor System of Measurement Inch Anchor Diameter 1/4 in Thread Size 1/4 In.-20 Overall Length 2 in Thread Length Not Applicable Eyelet Hole Size 9/32 in Material Steel Material Grade/Class Medium Carbon Finish Zinc Plated Compatible Material Concrete Drill Bit Size 1/4 in Minimum Installation Depth 1 1/8 in Minimum Material Thickness 3 1/4 in Nut Width 0.4375 in Washer Outside Diameter 0.625 in Wedge Anchor Type Tie-Wire Wedge Anchor Seismic Approved Yes