Iscar 5902461 Threading Insert 16IR 28 Tpi Un IC908

Product Description

The ISCAR 5902461 is a solid carbide laydown threading insert designed for internal UN thread cutting at 28 threads per inch (TPI). It carries the IC908 manufacturer grade with a PVD-applied TiAlN coating, offering wear resistance and thermal stability across a wide range of workpiece materials. The insert features a 3/8 inch (0.375 inch decimal) inscribed circle, a 0.143 inch thickness, and a right-hand cutting orientation. It is used in CNC lathe and turning center applications where consistent thread form accuracy and tool life are priorities. Machinists and tool crib professionals in production and job shop environments handle this insert type.

This insert is suited for internal threading operations on materials classified under ISO workpiece material groups H, K, M, N, P, and S, making it applicable across hardened steels, cast irons, stainless steels, non-ferrous metals, carbon and alloy steels, and heat-resistant superalloys. The UN thread standard applies to inch-based fastener and component threads common in North American manufacturing and maintenance machining. It is a direct-fit replacement style insert for toolholders accepting the 16IR insert style designation.

Key Features

• IC908 solid carbide grade with PVD TiAlN coating for extended tool life across multiple material groups
• 28 TPI UN internal thread form for inch-standard thread cutting
• Right-hand cutting orientation
• 3/8 inch inscribed circle (0.3750 inch decimal) for 16IR-series toolholder compatibility
• 0.143 inch insert thickness
• Corner radius of 0.0016 inch (0.04 mm) for precise thread root geometry
• Compliant with ISO 13399 tooling data standards

Compatibility

Designed for use with 16IR-style internal threading toolholders. Compatible with workpiece materials across ISO material groups H, K, M, N, P, and S. Verify toolholder pocket specifications and insert style code before installation.

Installation Notes

Threading inserts of this type are installed and indexed by qualified machinists or CNC setup technicians. Power down and lock out the machine spindle before changing inserts. Use the appropriate torx or hex key to the toolholder manufacturer torque specification when seating the clamp screw. Handle solid carbide inserts with care to avoid chipping the cutting edge during installation.