Seco 00049791 Threading Insert 11 Tpi 3/8 in Ic Un CP500

Product Description

The SECO 00049791 is a laydown threading insert designed for right-hand external UN thread cutting at 11 threads per inch (TPI). Built from solid carbide with a PVD-applied TiAlN/TiN finish, it carries the CP500 manufacturer grade and belongs to the Snap-Tap series. The 60-degree included angle matches the UN thread form standard. With a 3/8-inch inscribed circle and a thickness of 0.1366 inches, this insert fits standard laydown toolholders used in CNC and manual turning operations. It is rated for universal primary workpiece material compatibility, covering a broad range of ferrous and non-ferrous materials. CNC machinists and tool-and-die professionals install this insert on lathes and turning centers for precision external thread production.

This insert is suited for external UN threading on a wide range of production and job-shop turning applications. The CP500 grade with PVD TiAlN/TiN coating provides wear resistance for threading in cast iron, aluminum, steel, stainless, and high-temperature alloys. The 11 TPI specification covers common fastener and fitting thread pitches. It is appropriate for both light-production runs and high-volume thread cutting where consistent thread form and tool life are required. Licensed machinists and production turners working to ISO standards will find the geometry and grade well-matched to external threading on turning centers and engine lathes.

Key Features

• Right-hand external UN thread form with 60-degree included angle
• 11 TPI for common fastener and fitting thread applications
• CP500 solid carbide grade with PVD TiAlN/TiN finish for extended wear resistance
• 3/8-inch inscribed circle fits standard laydown threading toolholders
• Snap-Tap series design for consistent seating and repeatable thread accuracy
• Universal workpiece material rating — compatible across material codes K, M, N, P, and S

Compatibility

Designed as an OEM-style replacement laydown threading insert for standard 16ER-style toolholders requiring an 11 TPI UN thread form insert with a 3/8-inch inscribed circle.

Installation Notes

Installation is performed by qualified CNC machinists or manual lathe operators following standard insert-change procedures. Power down and lock out the machine spindle before replacing the insert. Seat the insert fully in the pocket and torque the clamping screw to the toolholder manufacturer specification — do not over-tighten carbide inserts. Verify thread form and pitch with a thread gauge or thread ring gauge after the first pass before committing to full production depth.