Key Locking Thread Insert System of Measurement Inch Insert Diameter 7/8 in Overall Length 7/8 in Internal Thread Size 5/8 In.-18 Internal Thread Fit 3B External Thread Size 7/8 In.-14 External Thread Fit 2A Thread Direction Right Hand Thread Type Fine Material Steel Finish Black Phosphate Wall Type Heavy Wall Number of Locking Keys 4 Compatible Material Metal Compatible Tap Size 7/8 In.-14 Drill Bit Size 53/64 in Minimum Installation Depth 1 in