Description:

6.3mm / 1/4 inch Hex Shank Tap Thread Size: M4; Pitch: 0.7; Accuracy: H2. Thread Length: 22mm / 0.87 inch; Total Length: 67mm / 2.6 inch. Material: HSS (High Speed Steel); Surface Treatment: Blackening Finish. Spiral flutes for better chip clearing process. Self-centering point, do not need assistant center drilling or center punching.. Complete hole drilling, tapping, deburring and countersink in one operation with power drill, saves labor and time. Suitable for drilling, tapping, cutting on wood, soft metal, aluminum plate, iron, plank, plastic etc..