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 Steel Material Grade/Class Grade 2 Finish Galvanized 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