Iscar 5903442 Threading Insert 12 Tpi Un 3/8 Inch Ic

Product Description

The ISCAR 5903442 is a solid carbide laydown threading insert designed for external UN thread cutting at 12 threads per inch. It carries the IC1007 grade designation with a TiAlN PVD coating applied for wear resistance across a broad range of workpiece materials. The insert uses a 16ERM style profile with a 3/8 inch (0.375 inch) inscribed circle and a nominal thickness of 0.143 inches. The right-hand cutting geometry is paired with the M chipbreaker and submicron carbide substrate, making it suited for threading passes that demand consistent thread form and edge stability across mixed material applications.

This insert is used in external threading operations on CNC lathes and turning centers where UN inch-series threads are required. At 12 TPI, it is commonly applied to medium-pitch fastener threads on components machined from steel, stainless, cast iron, aluminum, non-ferrous alloys, and high-temperature alloys, reflecting the H, K, M, N, P, and S workpiece material codes listed by the manufacturer. It fits toolholders designed for the 16ERM insert style and is installed by qualified machinists or CNC setup technicians in production and job-shop environments.

Key Features

• IC1007 submicron solid carbide grade with TiAlN PVD coating for extended tool life
• 16ERM insert style, right-hand cutting, M chipbreaker geometry
• 12 TPI UN external thread profile for inch-series threading
• 3/8 inch inscribed circle (0.375 inch) for compatibility with standard 16ERM toolholders
• 0.143 inch insert thickness for secure seating in laydown-style pockets
• Broad workpiece material compatibility: steel, stainless, cast iron, aluminum, non-ferrous, and superalloys
• Manufactured to ISO 13399 standards for tool data exchange

Compatibility

Designed for use in toolholders accepting the 16ERM laydown threading insert style. Confirm toolholder pocket geometry, insert style, and screw-clamp configuration against manufacturer toolholder documentation before installation.

Installation Notes

Threading inserts of this type are installed by machinists or CNC tooling technicians. Power down and lock out the machine before changing inserts. Seat the insert fully and evenly in the pocket before tightening the clamping screw to the toolholder manufacturer's specified torque. Inspect the insert seat and clamp for chips or damage that could affect insert stability and thread accuracy.