High speed steel, ground threads
Square drive shank
Right hand cutting direction ; WARWICK NPTI (INTERRUPTED NATIONAL PIPE THREAD)TAPS ; Application: ; HSS interrupted thread pipe taps are designed for tapping soft or tough stringy metals that tend to load threads with chips. Interrupted thread pipe taps start with a few full threads and then have every other thread removed along the thread helix to provide more chip space, better lubrication, and to reduce drag.