Iscar 5901938 Threading Insert 8 Tpi Npt IC908 Carbide

Product Description

The ISCAR 5901938 is a laydown threading insert designed for internal NPT thread cutting at 8 threads per inch. Built from solid carbide with an IC908 grade designation and a PVD-applied TiAlN coating, this insert delivers wear resistance and thermal stability across a wide range of workpiece materials. The 3/8 inch inscribed circle (0.375 inches) and 0.143 inch thickness conform to the 16IR insert style geometry. It is suited for CNC lathes and turning centers where consistent thread form and insert-to-insert repeatability are required. Licensed machinists and CNC programmers in production and job-shop environments are the primary users.

This insert is used for cutting internal NPT tapered pipe threads on lathes and turning centers. The NPT thread standard is common in plumbing, hydraulic, and pneumatic fitting production where pressure-tight tapered thread connections are required. The IC908 grade and TiAlN coating make it suitable for threading across multiple material groups, including steel, stainless steel, cast iron, aluminum, and high-temperature alloys, as reflected by the broad primary workpiece material codes. Package quantity is 1 insert per unit, with a minimum order quantity of 5 units.

Key Features

• IC908 solid carbide grade with PVD TiAlN coating for extended tool life in varied materials
• Internal NPT thread form at 8 TPI for tapered pipe thread applications
• 3/8 inch inscribed circle, 16IR insert style for compatibility with standard ISCARTHREAD toolholders
• Right-hand cutting orientation for conventional lathe threading operations
• Conforms to ISO 13399 tooling data standards for use with CAM and presetter software
• 0.143 inch insert thickness and 0.005 inch corner radius for precise thread profile control

Compatibility

Designed for use with toolholders accepting the 16IR insert style within the ISCARTHREAD series. Verify toolholder insert pocket geometry, clamping style, and seat size before installation. No additional compatible model numbers were specified in the product data.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the tool turret is de-energized before seating or removing the insert. Use the appropriate torx or clamping screw driver to secure the insert to the specified clamp torque listed in the toolholder documentation - do not overtighten, as carbide inserts are brittle. Confirm insert seating and orientation before running the threading cycle.