Iscar 5902387 Threading Insert 8 Tpi 3/8 Inch IC908

Product Description

The ISCAR 5902387 is a laydown-style threading insert designed for right-hand internal UN thread cutting at 8 threads per inch (TPI). Built from solid carbide and finished with a PVD-applied TiAlN coating, it carries the IC908 manufacturer grade and is engineered for consistent performance 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 0.20 mm corner radius. It is used in CNC and manual turning applications where precise internal thread form and tool life are priorities. Licensed ISCARTHREAD series tooling is typically installed by machining professionals in production and job-shop environments.

This insert is suited for internal UN threading operations on a broad range of materials, including steels, stainless steels, cast irons, non-ferrous metals, high-temperature alloys, and hardened materials, as reflected by its primary workpiece material codes H, K, M, N, P, and S. The 16IR insert style and 16 size code position it for use in standard 16IR boring bar and threading toolholders. It is appropriate for both high-volume production runs and precision single-part work where thread quality and repeatability are required.

Key Features

• Solid carbide substrate with PVD-applied TiAlN coating for wear resistance
• IC908 grade rated for universal workpiece material compatibility
• Right-hand internal UN thread form at 8 TPI
• 3/8 inch inscribed circle (0.3750 inch decimal) for precise toolholder seating
• M chipbreaker geometry for chip control during internal threading
• Conforms to ISO 13399 tooling data standards

Compatibility

Designed for use in standard 16IR-style internal threading toolholders and boring bars that accept laydown inserts with a 3/8 inch inscribed circle. Compatible with workpiece material grades C1, C2, C6, and C7 as specified by the manufacturer.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Ensure the machine spindle is fully stopped and the toolholder is secured before seating or replacing the insert. Use the correct torque wrench and insert screw for the toolholder series to avoid cracking the carbide substrate. Verify thread form and pitch with a thread gauge after first-article setup before committing to a production run.