Expansion Screw Anchor Anchor Diameter 5/16 in Overall Length 1 in Screw Size 5/16 in Thread Size 5/16 In.-18 Thread Depth 0.75 in Thread Type Coarse Material Zamac Alloy Finish Plain Drill Bit Size 5/8 in Minimum Installation Depth 1 in System of Measurement Inch Expansion Anchor Type Caulking Anchor Material Grade/Class Not Graded Compatible Material Block Brick Concrete Stone Installation Method Machine Screw Minimum Hole Depth 1 in Manufacturer Location Made in USA