Iscar 5921246 Threading Insert 12 Tpi 3/8 Inch IC808 Carbide

Product Description

The ISCAR 5921246 is a laydown threading insert designed for right-hand external UN thread cutting at 12 threads per inch (TPI). Built from solid carbide with a TiAlN PVD coating under the IC808 grade designation, this insert delivers wear resistance and thermal stability in demanding threading operations. It carries a 3/8 inch (0.375 inch decimal) inscribed circle and a thickness of 0.143 inches. The IC808 grade is suited for a broad range of workpiece materials, covering steel, stainless, cast iron, nonferrous, and superalloys. Licensed machinists and CNC turning specialists install this insert into compatible ISCAR ISCARTHREAD toolholders for production threading on lathes and turning centers.

This insert is used in metal cutting applications requiring precise external UN-standard threads at 12 TPI. It fits turning and threading operations on a wide range of materials classified under primary workpiece material codes H, K, M, N, P, and S. The M-style chipbreaker geometry supports controlled chip flow during threading passes. Typical applications include threading on shafts, fasteners, fittings, and machined components in industrial manufacturing environments.

Key Features

• IC808 PVD TiAlN-coated solid carbide grade for extended tool life across universal workpiece materials
• Right-hand external UN thread form at 12 TPI for standard inch-series threading
• 3/8 inch inscribed circle (0.375 inches decimal) with 0.143 inch insert thickness
• M-style chipbreaker for reliable chip control during threading passes
• 0.010 inch (0.25 mm) corner radius for consistent thread profile
• Compliant with ISO 13399 cutting tool data representation standards

Compatibility

Designed as an OEM-style replacement threading insert for use in ISCAR ISCARTHREAD series toolholders accepting 16ERM-style laydown inserts for external UN threading applications.

Installation Notes

Threading inserts are installed and replaced by machinists and CNC tooling technicians. Power down and lock out the machine spindle before changing inserts. Seat the insert fully in the pocket and torque the clamping screw to the toolholder specification listed in the holder documentation. Inspect the insert seat and clamping screw for wear or damage before each installation.