6 Piece High Speed Steel NPT Pipe Tap Set, 1/8", 1/4", 3/8", 1/2", 3/4" and 1" in Wooden Case, DWTHS1/8-1SET

6 Piece High Speed Steel NPT Pipe Tap Set 1/8" 1/4" 3/8" 1/2" 3/4" and 1" in Wooden Case DWTHS1/8-1SET6 Piece High Speed Steel NPT Pipe Tap Set 1/8" 1/4" 3/8" 1/2" 3/4" and 1" in Wooden CaseNational Pipe Taper Taps (NPT) are appropriate for threading a wide variety of materials both ferrous and non-ferrousThe nominal size of a Pipe Tap is that of the pipe fitting to be tapped not the actual size of the tapThe thread tapers 3/4 of an inch per footAll Pipe Taps furnished with a 2-1/2 to 3-1/2 thread chamgerNPT threads require the use of a "sealer" like teflon tape or pipe compound.