Carmex Internal UN Threadmill Insert 21mm/ 24 TPIMill Thread Insert UN 24 TPI, Internal The 21 I 24 UN MT7 Mill Thread Insert is engineered for internal threading of Unified National (UN) profiles using CNC milling machines with helical interpolation. Designed for a fine pitch thread of 24 TPI, this insert is ideal for producing precise threads in high accuracy applications. Its insert size of 21, height of 12 mm, and thickness of 4. 7 mm make it suitable for stable cutting in medium to large bore

3 mm) enables smooth cutting action

and manufacturing settings

and reliable performance across demanding production environments

Their range of precision cutting tools includes Thread Turning Inserts

ensuring the proper fit and optimal performance

The UN Full Profile Internal Thread Turning Insert is specifically designed for producing high-precision Unified thread forms (UNC

UNC Thread Form – ¾″ diameter with 10 TPI

Ideal for multi-pitch threading with excellent wear resistance

✔ Long Series Design – Ensures accessibility to deep cavities and allows for precise work in hard-to-reach areas

this insert offers a reliable combination of wear resistance and toughness

Ideal for Stainless & Alloy Steels – Specifically designed for difficult-to-machine metals

applying counterforce to ensure smooth and controlled drilling