Irwin High Carbon Taps - Multiple Sizes

These Irwin Hanson taps are ideal for general-purpose threading, producing a class 2B thread. We offer them in two sizes corresponding to the most common grease fittings found in North America. Great for replacing press-fit Zerks that keep popping out, or retapping old threads in the field. Note that the thread descriptions can be counter-intuitive. The 1/4"-28 tap is smaller than the 1/8" NPT tap.  We also offer T-handle tap wrenches for both sizes here.  1/4"-28 NF High Carbon Steel Plug Tap (Small) 28 threads per inch Straight flutes ground for rapid chip removal Use with a #3 drill bit 1/8"-27NPT High Carbon Steel Taper Tap (Large) 27 threads per inch Tapered threads Use with a Q drill bit