Carmex Carbide Threading Insert - Unified - TiAlN Coated - 21I7UN Blacksmith Drill low-vibration operation and longer tool

low-vibration operation and longer tool life

delivering reliable performance across hardened steels

making it suitable for precise slotting in demanding materials

with a practical 24–48 hour despatch window

The spiral flute geometry efficiently evacuates chips as you cut

Carmex Carbide Threading Insert - Unified - TiAlN Coated - 21I7UN Blacksmith Drill low-vibration operation and longer toolThe Carmex Carbide Threading Insert Unified TiAlN Coated (21I7UN) is a versatile threading solution designed for workshops that need reliable, high precision threads across multiple profiles. Built for machinists who value flexibility and edge life, this unified insert family reduces tool changes while delivering consistent performance on both internal and external threads. Thread profile coverage: A versatile collection of threading inserts that