Iscar 5901964 Threading Insert 20 Tpi 3/8 Inch IC908

Product Description

The ISCAR 5901964 is a laydown threading insert engineered for external UN thread cutting on CNC lathes and turning centers. Manufactured from solid carbide with an IC908 grade and PVD-applied TiAlN coating, it delivers controlled wear resistance across a wide range of workpiece materials. The insert produces right-hand external UN threads at 20 threads per inch (TPI) with a 3/8 inch (0.3750 inch decimal) inscribed circle and a thickness of 0.1430 inches. The 16ER insert style seats in standard laydown threading toolholders. Machinists and CNC operators use this insert in production threading operations where dimensional consistency and tool life are priorities.

This insert is suited for threading operations in light to medium-duty turning applications across a broad material spectrum. The IC908 carbide grade with TiAlN PVD coating handles materials classified under ISO material groups H, K, M, N, P, and S, covering steels, stainless alloys, cast irons, non-ferrous metals, and heat-resistant superalloys. It is appropriate for both job shop and production floor environments where UN-standard external threads are required on turned components. Typical applications include threaded shaft features, fastener profiles, and coupling threads machined on manual or CNC turning equipment.

Key Features

• IC908 solid carbide grade with PVD TiAlN coating for extended tool life across multiple material groups
• Right-hand external UN thread form at 20 TPI for standard unified thread production
• 3/8 inch inscribed circle (0.3750 inch decimal) in 16ER laydown style for secure toolholder seating
• 0.1430 inch insert thickness provides rigidity and stable cutting edge support
• Compatible with ISO material groups H, K, M, N, P, and S - broad workpiece material coverage
• Conforms to ISO 13399 insert identification standards for toolholder pairing verification

Compatibility

Designed for use in standard 16ER laydown threading toolholders. Compatible with material grades C1, C2, C6, and C7 workpiece classifications as listed in the ISCARTHREAD series specifications. Verify toolholder seat geometry and clamping style against the 16ER insert style before installation.

Installation Notes

Threading inserts of this type are installed and changed by qualified machinists or CNC tooling technicians following machine lockout and spindle-stop procedures before any insert indexing or replacement. Use the appropriate torx or hex key specified by the toolholder manufacturer to seat the insert clamp to the correct engagement - do not overtighten. Inspect the insert pocket and seating surfaces for chips or debris before seating a new insert. Handle carbide inserts with care to avoid chipping the cutting edge prior to use.