Description
NPTI Size: 1/4-18″
L2: 1 1/16″
L1: 2 7/16″
L3: 7/16″
A: 0.421″
Flutes: 5
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.
