Key Locking Thread Insert System of Measurement Inch Insert Diameter 3/4 in Overall Length 13/16 in Internal Thread Size 9/16 In.-12 Internal Thread Fit 3B External Thread Size 3/4 In.-16 External Thread Fit 2A Thread Direction Right Hand Thread Type Coarse Material Steel Finish Black Phosphate Wall Type Heavy Wall Number of Locking Keys 4 Compatible Material Metal Compatible Tap Size 3/4 In.-16 Drill Bit Size 45/64 in Minimum Installation Depth 15/16 in