Expansion Anchor Anchor Diameter 3/4 in Overall Length 3 15/16 in Screw Size 3/4 in Thread Size 3/4 In.-10 Thread Depth 1.125 in Thread Type Coarse Material Zamac Alloy Finish Plain Drill Bit Size 1 1/4 in Minimum Installation Depth 3 1/2 in System of Measurement Inch Expansion Anchor Type Double Expansion Anchor Material Grade/Class Not Graded Compatible Material Block Brick Concrete Stone Installation Method Machine Screw Minimum Hole Depth 3 1/2 in