Screw Anchor Anchor Diameter 1/2 in Overall Length 3 in Head Type Hex Head Width 0.75 in Head Diameter Not Applicable Drive Type External Hex Material Stainless Steel Finish Zinc Plated Material Grade/Class 410 Removable Removable Compatible Material Concrete Drill Bit Size 7/16 in Screw Anchor Type Concrete Screw Anchor System of Measurement Inch Maximum Material Thickness 1/2 in Maximum Ultimate Shear Strength 7 380 lb Maximum Ultimate Tension Strength 4 236 lb