Seco 00077857 Threading Insert 14 Tpi Unj Carbide CP500

Product Description

The SECO 00077857 is a laydown-style threading insert designed for external UNJ thread forms at 14 threads per inch (TPI). Built from solid carbide in the CP500 grade, it carries a PVD-applied TiAlN/TiN coating that extends cutting edge life across a broad range of workpiece materials. The insert seats in a right-hand orientation and features a 60-degree included angle consistent with unified thread geometry. With a 3/8 inch inscribed circle and a thickness of 0.1366 inches, it is sized for standard laydown threading toolholders used on CNC lathes and turning centers. Machinists and tool-and-die professionals specify this insert for precision thread-turning applications where UNJ form compliance is required.

This insert is suited for external threading operations on components where UNJ thread standards are specified, such as aerospace fasteners, hydraulic fittings, and precision mechanical assemblies. The CP500 grade with PVD coating performs across universal workpiece material classes, covering cast iron, non-ferrous metals, non-metals, steel, and heat-resistant superalloys as indicated by the material codes K, M, N, P, and S. It fits into the Snap-Tap series toolholder system and is appropriate for both production threading and job-shop turning environments.

Key Features

• Solid carbide CP500 grade with PVD TiAlN/TiN coating for extended tool life
• Right-hand external UNJ thread form at 14 TPI with 60-degree included angle
• 3/8 inch inscribed circle fits standard Snap-Tap series laydown toolholders
• Compatible with universal workpiece material classes: K, M, N, P, and S
• Corner radius of 0.0110 inches for consistent thread root geometry
• ISO-standard insert geometry for predictable seating and repeatability

Compatibility

Designed for use with Snap-Tap series laydown threading toolholders accepting a 16ER insert style with a 3/8 inch inscribed circle. No additional specific compatible model numbers were provided in the product data.

Installation Notes

Installation is performed by machinists or CNC setup technicians. Power down and lock out the machine spindle before seating or replacing the insert. Ensure the toolholder pocket and clamping mechanism are clean and free of chips before placing the insert. Do not exceed the insert manufacturer's recommended depth-of-cut or feed parameters for the CP500 grade.