Iscar 5902148 Threading Insert 20 Tpi Unj IC908

Product Description

The ISCAR 5902148 is a laydown-style external threading insert designed for precision UNJ thread forms at 20 threads per inch. Built from solid carbide with a PVD-applied TiAlN coating and ISCAR IC908 grade, this insert delivers consistent thread geometry and wear resistance in demanding CNC turning applications. The 16ER insert style features a 3/8 inch (0.375 inch decimal) inscribed circle, a thickness of 0.143 inches, and a corner radius of 0.007 inches. It is engineered for right-hand external threading and is part of the ISCARTHREAD series. Machinists and CNC operators working across a broad range of workpiece materials will find this insert compatible with universal primary workpiece material classifications.

This insert is suited for external UNJ thread turning operations on CNC lathes and turning centers. The UNJ thread standard is commonly specified in aerospace and high-strength fastener applications where a controlled root radius is required to reduce stress concentration. The IC908 carbide grade with PVD TiAlN coating performs across a wide material range, covering ISO workpiece material codes H, K, M, N, P, and S. It fits standard 16ER toolholders used in production threading on both light and medium-duty turning setups.

Key Features

• IC908 solid carbide grade with PVD TiAlN coating for broad material compatibility and wear resistance
• 20 TPI UNJ external right-hand thread form with controlled root radius geometry
• 3/8 inch inscribed circle (0.375 inch decimal) in 16ER laydown insert style
• 0.143 inch insert thickness and 0.007 inch corner radius for precise thread profile
• Compatible with ISO workpiece material codes H, K, M, N, P, and S
• Conforms to ISO 13399 insert identification standards

Compatibility

Designed as a replacement-style threading insert for standard 16ER external threading toolholders. Specific toolholder compatibility should be confirmed against ISCAR ISCARTHREAD series toolholder specifications.

Installation Notes

Installation is performed by a qualified CNC machinist or tooling technician. Ensure the machine spindle is fully stopped and the turret is in a safe index position before seating or replacing inserts. Use the appropriate torx or clamping key specified for the toolholder to secure the insert to the correct clamping torque per the toolholder manufacturer documentation. Verify insert orientation for right-hand external threading before resuming cutting operations.