Expansion Anchor Machine Screw Zinc Alloy Anchor Dia 5/8 In. Length 1-1/2 In. Screw Size 5/16-18 Internal Thread Size 5/16-18 Drill Size 5/8 In. Min Embedment 1-1/2 In. Ultimate Shear in 3000 PSI Concrete (Lb.) 2400 Ultimate Tension in 3000 PSI Concrete (Lb.) 2620 Use With Machine Screws Application Concrete and Block Package Quantity 25