Carbon steel pipe taps are designed to clean and or re-thread damaged or jam pipe threads
Also called 'pipe taps', National Pipe Taper (NPT) taps are appropriate for threading a wide variety of materials both ferrous and non-ferrous.
The nominal size of a Pipe Tap is that of the pipe fitting to be tapped, not the actual size of the tap.
The thread tapers 3/4 of an inch per foot. All Pipe Taps furnished with a 2-1/2 to 3-1/2 thread chamfer.
6 Piece Set of Carbon Steel NPT Pipe Taps, Sizes /4", 3/8", 1/2", 3/4", 1" and 1-1/4"