Seco 00077849 Threading Insert 40 Tpi 3/8 in Ic Un CP500

Product Description

The SECO 00077849 is a laydown threading insert designed for internal UN thread cutting at 40 threads per inch. Built from micrograin solid carbide with a CP500 grade and PVD-applied TiAlN/TiN coating, it delivers consistent edge performance across a wide range of workpiece materials. The 60-degree included angle suits standard unified thread profiles. With a 3/8 inch inscribed circle and a thickness of 0.1366 inches, this insert fits standard laydown toolholders in the Snap Tap series. It is installed by machinists and CNC operators performing precision threading operations on lathes and turning centers in production and job shop environments.

This insert is suited for internal thread turning applications on materials classified under ISO workpiece codes K, M, N, P, and S, making it applicable across cast irons, non-ferrous metals, non-metals, steels, and heat-resistant superalloys. The right-hand cutting orientation and UN thread standard make it a practical choice for general-purpose internal threading in both low-volume job shop work and higher-volume production runs. It ships in a package quantity of one insert, with a minimum order of two units.

Key Features

• Solid carbide micrograin substrate with CP500 manufacturer grade for wear resistance
• PVD-applied TiAlN/TiN coating for thermal and abrasion resistance
• 40 TPI internal UN thread form with 60-degree included angle
• Right-hand cut orientation for standard internal threading applications
• 3/8 inch inscribed circle fits common Snap Tap series laydown toolholders
• ISO-rated for universal workpiece materials including steels, cast irons, non-ferrous, and superalloys

Compatibility

Designed for use with laydown-style internal threading toolholders in the Snap Tap series accepting a 3/8 inch inscribed circle insert with 16NR geometry. Suitable for machining ISO workpiece material codes K, M, N, P, and S.

Installation Notes

Insert seating and clamping should be performed with the machine fully powered down and spindle locked. Use the appropriate torx or hex key as specified by the toolholder manufacturer to secure the clamping screw to the correct seating torque per the holder documentation. Inspect the insert pocket for chips or wear before seating a new insert. Replace the insert at the first sign of chipping or thread form degradation to avoid damage to the workpiece or toolholder.