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, Eyelet Hole Size Not Applicable, 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 4 in, Ultimate Shear Strength (4,000 psi Concrete) 1,472 lb, Ultimate Tension Strength (4,000 psi Concrete) 2,711 lb, Nut Width 0.4375 in