Seco 00049917 Threading Insert 20 Tpi Unj Carbide CP500

Product Description

The SECO 00049917 is a laydown threading insert engineered for external UNJ thread forms at 20 threads per inch (TPI). Built from solid carbide in the CP500 grade, it carries a PVD-applied TiAlN/TiN finish that extends cutting edge life in demanding threading operations. The insert follows a right-hand cutting geometry with a 60-degree included angle, fitting the 16ER insert style used in standard Snap-Tap toolholders. With a 3/8-inch inscribed circle (IC) and a thickness of 0.1366 inches, this insert is sized for precise, repeatable thread profile generation on external workpiece features. It is sold individually with a minimum order quantity of two pieces.

This insert is intended for CNC lathes and turning centers performing external UNJ-standard threading on a broad range of workpiece materials. The CP500 grade with PVD coating is rated for universal application, covering cast iron, non-ferrous alloys, non-metals, carbon and alloy steels, and heat-resistant superalloys — reflected in material codes K, M, N, P, and S. Typical users include CNC machinists and toolroom technicians working to ISO threading standards where UNJ thread form requirements apply, such as aerospace and precision mechanical assemblies.

Key Features

• 16ER insert style fits Snap-Tap compatible right-hand external threading toolholders
• CP500 solid carbide grade with PVD TiAlN/TiN coating for extended tool life
• 20 TPI UNJ thread form with 60-degree included angle for accurate profile generation
• Universal material compatibility across K, M, N, P, and S workpiece material codes
• Corner radius of 0.0070 inches supports clean thread root geometry
• Conforms to ISO threading insert standards

Compatibility

Designed for use in 16ER-style Snap-Tap external threading toolholders that accept laydown inserts with a 3/8-inch inscribed circle. Suited for machines and setups requiring UNJ external thread forms at 20 TPI to ISO standards.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician. Power down and de-energize the machine before seating or replacing inserts. Use the appropriate torx or hex key to secure the insert clamp to the manufacturer-specified feel — do not overtighten by feel alone; follow the toolholder manufacturer torque guidance. Inspect the insert seat and clamp for chips or debris before mounting to ensure full, flat insert contact.