Expansion Anchor, Machine Screw Expansion Anchor, Zinc Alloy, Anchor Dia. 1/2 in, Anchor Internal Thread Dia. 1/4 in, Anchor Length 1 5/16 in, Screw Size 1/4 in, Internal Thread Size 1/4-20, Anchor Drill Size 1/2 in, Min. Embedment 1 5/16 in, Ultimate Shear in 3000 PSI Concrete (Lb.) 1,750 lb, Ultimate Tension in 3000 PSI Concrete (Lb.) 2,410 lb