Self Locking Thread Insert Compatible Material Metal Compatible Tap Size 3/8 In.-16 Drill Bit Size Q External Thread Fit 2A External Thread Size 3/8 In.-16 Finish Black Phosphate Insert Diameter 3/8 in Internal Thread Fit 2B Internal Thread Size 1/4 In.-20 Material Steel Material Grade/Class 12L14 Maximum Hole Diameter 0.332 in Minimum Installation Depth 7/16 in Overall Length 3/8 in System of Measurement Inch Thread Direction Right Hand Thread Type Coarse Wall Type Thin Wall