Seco 00077925 Threading Insert 20 Tpi Un Solid Carbide CP500

Product Description

The SECO 00077925 is a laydown threading insert designed for external UN thread cutting at 20 threads per inch. Built from micrograin solid carbide with a PVD-applied TiAlN/TiN coating in manufacturer grade CP500, this insert delivers consistent thread form geometry on demanding workpiece materials. The 16ER insert style seats in compatible laydown toolholders and produces a 60-degree included angle profile standard to UN thread forms. With a 3/8-inch inscribed circle and 0.1366-inch thickness, it is sized for a wide range of external threading applications in machining and production environments. This insert is typically installed by machinists and CNC turning center operators.

This insert is suited for external threading operations on stainless steel and other material grade M workpieces in production turning, job shop, and manufacturing environments. The A2 chipbreaker geometry supports controlled chip flow during threading passes. It is part of the Snap Tap series and conforms to ISO standards for indexable threading inserts. Right-hand cutting orientation makes it compatible with standard right-hand external threading setups on CNC lathes and turning centers.

Key Features

• Solid micrograin carbide substrate with PVD TiAlN/TiN coating for wear resistance on stainless steel
• 20 TPI UN external thread profile with 60-degree included angle
• CP500 manufacturer grade optimized for material grade M workpieces
• A2 chipbreaker geometry for controlled chip evacuation during threading
• 3/8-inch inscribed circle, 0.1366-inch thickness — 16ER laydown insert style
• ISO-standard insert geometry; right-hand cutting orientation

Compatibility

Designed as an OEM-style replacement or direct-fit insert for toolholders accepting the 16ER laydown insert style in right-hand external threading configurations.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torque wrench and manufacturer-specified clamping hardware for the 16ER seat to ensure proper insert location and clamping force. Inspect the toolholder pocket for wear or debris before seating the insert, as contamination in the pocket can affect thread form accuracy.