Key Locking Thread Insert System of Measurement Inch Insert Diameter 7/16 in Overall Length 3/8 in Internal Thread Size 1/4 In.-28 Internal Thread Fit 3B External Thread Size 7/16 In.-14 External Thread Fit 2A Thread Direction Right Hand Thread Type Fine Material Stainless Steel Finish Plain Wall Type Heavy Wall Number of Locking Keys 2 Compatible Material Metal Compatible Tap Size 7/16 In.-14 Drill Bit Size X Minimum Installation Depth 7/16 in Maximum Hole Diameter 0.397 in