Machinists and metalworkers, this HARFINGTON tap and drill bit set is perfect for your threading needs! The straight flute tap is sized at 12-28 UNF with 2B accuracy - ideal for through holes or shallow holes in materials like aluminum, die steel, stainless steel, bronze, and hard plastics. Made from 6542 High Speed Steel, this tap features downward chip removal that makes for fast, accurate tapping with clean threads every time. The matching 4.6mm drill bit is made from M35 5% Cobalt High Speed Steel, giving it serious hardness (HRC65-66) and red hardness for drilling through tough materials. The spiral chip space design ensures fast, clean chip removal without clogging, and the sharp cutting edge provides smooth, glitch-free cutting action. The tap measures 70mm total length with a 27mm thread length, while the drill bit is 80mm total with a 47mm cutting edge. These are professional-grade tools that work great on drilling machines, tapping machines, CNC equipment, and milling machines. Just remember to use tapping oil for better thread quality and longer tool life, and for best results with the tap, use it with tap collets that have overload protection rather than trying to hand-tap (which can easily break these precision tools). The right feed rate and cutting speed will maximize tool life and give you perfect results every time. Seriously quality tools that won't let you down in the shop!
Free 30-day returns 
Free 30-day returns
