Self Locking Thread Insert Compatible Material Metal Compatible Tap Size 5/16 In.-18 Drill Bit Size F External Thread Fit 2A External Thread Size 5/16 In.-18 Finish Black Phosphate Insert Diameter 5/16 in Internal Thread Fit 2B Internal Thread Size #8-32 Material Steel Material Grade/Class 12L14 Maximum Hole Diameter 0.257 in Minimum Installation Depth 7/16 in Overall Length 19/64 in System of Measurement Inch Thread Direction Right Hand Thread Type Coarse