Carmex External Right Hand UN Unified Thread Turning Insert 12 TPI / 16 ER 12 UN P25C

External Thread Turning Insert – UN Full Profile 60°

The UN Full Profile External Thread Turning Insert is engineered for producing Unified thread forms (UNC, UNF, UNEF, UNS) with consistent precision. Designed for a pitch of 12 TPI, this insert forms the complete thread geometry—including crest, root, and flanks—in a single operation, ensuring strong, accurate external threads suitable for high-performance applications.

Crafted from P25C-grade carbide, this insert delivers exceptional wear resistance, edge stability, and heat tolerance—making it well-suited for difficult materials such as stainless steels and heat-resistant alloys. The defined X and Y geometry ensures smooth cutting engagement, chip control, and thread form accuracy.

Key Features:

• Ordering Code: 16 ER 12 UN P25C
• Thread Type: UN (Unified Thread Standard – 60°)
• Profile: Full Form
• Insert Type: External
• Hand: Right Hand
• L: 16 mm
• I.C.: 3/8"
• Pitch: 12 TPI
• X: 1.1 mm
• Y: 1.4 mm
• Carbide Grade: P25C
• Applications: External Thread Turning for Unified (UN) Thread Forms
• Key Advantage: Full-profile thread accuracy with excellent tool life and wear resistance in demanding materials

Manufactured by Carmex Precision Tools Ltd.—a world-class leader in threading solutions—this insert is part of a comprehensive product line that includes Thread Turning Inserts, Mill Thread systems, and Solid Carbide threadmills. Carmex tools are trusted globally for their precision, durability, and high-performance machining capabilities.