Self Locking Thread Insert Compatible Material Metal Compatible Tap Size M8-1.25 Drill Bit Size 6.9mm External Thread Fit 6G External Thread Size M8-1.25 Finish Black Phosphate Insert Diameter 8 mm Internal Thread Fit 6H Internal Thread Size M4-0.70 Material Steel Material Grade/Class 12L14 Maximum Hole Diameter 6.9 mm Minimum Installation Depth 9 mm Overall Length 7 mm System of Measurement Metric Thread Direction Right Hand Thread Type Coarse Wall Type Standard Wall