Carmex Internal UN Threadmill Insert 21mm / 12 TPI / 21 I 12 UN MT7-0

Carmex Internal UN Threadmill Insert 21mm / 12 TPI / 21 I 12 UN MT7

$110.50
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Carmex Internal UN Threadmill Insert 21mm / 12 TPI / 21 I 12 UN MT7-0
  • Carmex Internal UN Threadmill Insert 21mm / 12 TPI / 21 I 12 UN MT7-0
  • Carmex Internal UN Threadmill Insert 21mm / 12 TPI / 21 I 12 UN MT7-1
  • Carmex Internal UN Threadmill Insert 21mm / 12 TPI / 21 I 12 UN MT7-2
  • Carmex Internal UN Threadmill Insert 21mm / 12 TPI / 21 I 12 UN MT7-3
  • Carmex Internal UN Threadmill Insert 21mm / 12 TPI / 21 I 12 UN MT7-0
  • Carmex Internal UN Threadmill Insert 21mm / 12 TPI / 21 I 12 UN MT7-1
  • Carmex Internal UN Threadmill Insert 21mm / 12 TPI / 21 I 12 UN MT7-2
  • Carmex Internal UN Threadmill Insert 21mm / 12 TPI / 21 I 12 UN MT7-3
Carmex Internal UN Threadmill Insert 21mm / 12 TPI / 21 I 12 UN MT7

Carmex Internal UN Threadmill Insert 21mm / 12 TPI / 21 I 12 UN MT7

$110.50

Mill-Thread Insert – UN 12 TPI, Internal

The Carmex 21 I 12 UN MT7 is a precision-engineered internal thread milling insert for machining Unified (UN) threads with 12 TPI. Optimized for CNC helical interpolation milling, it ensures accurate thread profiles, smooth cutting, and excellent surface finish across a wide range of materials.

Manufactured from MT7 fine-grain carbide, this insert delivers exceptional hardness, wear resistance, and thermal stability—providing long tool life and consistent dimensional accuracy. Its size 21 design enhances rigidity, ensuring vibration-free operation for precise thread milling.

Fully compatible with Carmex SR Series toolholders (single, twin, or multi-insert), it guarantees secure clamping and reliable performance in industrial thread milling applications.

Key Features & Benefits

  • Ordering Code: 21 I 12 UN MT7
  • Thread Type: Internal Threading
  • Thread Profile: UN – Unified 60°
  • TPI: 12
  • Insert Size: 21
  • H (Height): 12 mm
  • T (Thickness): 4.7 mm
  • Carbide Grade: MT7
  • Cutting Edge: Single
  • Applications: Internal Unified thread milling for precision, mechanical, and general engineering applications
  • Compatible Toolholders: SR Series (Single, Twin, Multi-Insert)

Carmex Precision Tools Ltd. produces industry-leading threading solutions, including Thread Turning Inserts, Mill-Thread Inserts, Solid Carbide Threadmills, and SR Toolholders engineered for durability, reliability, and precision.

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