The Voelkel 67230 Tap; HSS-G; M4; 0.7; 39mm; Mounting: screwdriver bit 1/4” (C6,3mm) is a precision-ground high-speed steel fluted tap with a 0.7 pitch, a 39mm cutting length, and a 1/4” (C6,3mm) bit for mounting. The tap is designed for threading and producing internal threads in metal materials such as cast iron, steel, brass, aluminum, and alloys. It is ideal for applications that require precision threading and a long tool life. The flutes provide fast chip removal and a smooth finish. The tap is designed to meet the highest quality standards for performance and durability.