Key Locking Thread Insert System of Measurement Inch Insert Diameter 3/8 in Overall Length 3/8 in Internal Thread Size 1/4 In.-28 Internal Thread Fit 3B External Thread Size 3/8 In.-16 External Thread Fit 2A Thread Direction Right Hand Thread Type Fine Material Stainless Steel Finish Plain Wall Type Thin Wall Number of Locking Keys 2 Compatible Material Metal Compatible Tap Size 3/8 In.-16 Drill Bit Size Q Minimum Installation Depth 7/16 in Maximum Hole Diameter 0.332 in