Key Locking Thread Insert System of Measurement Inch Insert Diameter 5/8 in Overall Length 5/8 in Internal Thread Size 1/2 In.-13 Internal Thread Fit 3B External Thread Size 5/8 In.-11 External Thread Fit 2A Thread Direction Right Hand Thread Type Coarse Material Steel Finish Black Phosphate Wall Type Thin Wall Number of Locking Keys 4 Compatible Material Metal Compatible Tap Size 5/8 In.-11 Drill Bit Size 37/64 in Minimum Installation Depth 11/16 in