Description
Mill-Thread Insert – UN 16 TPI, Internal
The 21 I 16 UN MT7 Mill-Thread Insert is built for internal threading of Unified National (UN) profiles on CNC milling machines using helical interpolation. With a thread pitch of 16 TPI, this insert is suitable for producing medium-fine threads with high precision and reliability. Its large insert size of 21, combined with a 21 mm height and 4.7 mm thickness, delivers outstanding cutting stability and performance in deep or high-strength threading applications.
Engineered from Carmex’s premium MT7 carbide grade, this insert ensures superior wear resistance and long tool life even in high-volume or demanding machining conditions. It is optimized for use with Carmex’s SR series toolholders, providing secure insert retention, optional internal coolant delivery, and efficient chip evacuation.
Key Features:
- Ordering Code: 21 I 16 UN MT7
- Thread Type: Internal Threading
- Thread Profile: UN – Unified National
- Pitch (TPI): 16
- Insert Size: 21
- H (Height): 21 mm
- T (Thickness): 4.7 mm
- Carbide Grade: MT7
- Insert Type: Internal-use only
- Applications: Medium-fine unified internal threads in robust and precision-demanding parts
- Key Advantage: Heavy-duty performance and accuracy, fully compatible with SR series toolholders
Carmex Precision Tools Ltd. is globally recognized for its advanced threading solutions. The company offers a full range of Thread Turning inserts, Mill-Thread tools, Spiral Mill-Thread, Solid Carbide threadmills, and matching SR Series Toolholders ensuring full compatibility and performance from toolholder to insert.
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