UN 15 degree helical flutes Thread Mills - full form
The 15° helical flute thread mills are non-crest cutting for internal threads only. The helical flutes distribute the side cutting pressure.
** PLEASE NOTE - WE ARE CLOSED FROM DECEMBER 23rd UNTIL JANUARY 5th, 2026 AND ORDERS WILL NOT BE SHIPPED DURING THIS TIME **
The 15° helical flute thread mills are non-crest cutting for internal threads only. The helical flutes distribute the side cutting pressure.