Expansion Screw Anchor Anchor Diameter 3/8 in Overall Length 1 1/4 in Screw Size 3/8 in Thread Size 3/8 In.-16 Thread Depth 1 in Thread Type Coarse Material Zamac Alloy Finish Plain Drill Bit Size 3/4 in Minimum Installation Depth 1 1/4 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 1/4 in Manufacturer Location Made in USA