Iscar 5996342 Laydown Threading Insert 4 Tpi Stub Acme

Product Description

The ISCAR 5996342 is a solid carbide laydown threading insert designed for cutting external Stub Acme threads at 4 threads per inch (TPI). Manufactured in the IC908 grade with a PVD-applied TiAlN coating, this insert delivers thermal resistance and edge durability across a wide range of workpiece materials. The right-hand configuration and 27ER insert style make it a direct-fit option for compatible ISCARTHREAD series toolholders. With an inscribed circle of 5/8 inch (0.6250 inches) and a thickness of 0.2510 inches, the insert seats precisely and repeats accurately across production runs. Licensed machinists, CNC operators, and toolroom technicians will find this insert suited to both job-shop and production threading applications.

This insert is intended for external Stub Acme thread-form cutting on a variety of workpiece materials, including steel, stainless steel, cast iron, non-ferrous alloys, and high-temperature alloys, as indicated by the universal primary workpiece material classification with material codes H, K, M, N, P, and S. Stub Acme threads are commonly found in lead screws, power transmission components, and valve stems. The 4 TPI pitch makes this insert applicable to larger-diameter threading passes where coarse thread forms are specified by drawing or standard.

Key Features

• IC908 carbide grade with PVD TiAlN coating for elevated heat and wear resistance
• 27ER insert style compatible with ISCARTHREAD series external threading toolholders
• Right-hand external Stub Acme thread form at 4 TPI
• 5/8 inch inscribed circle (0.6250 inches) for precise seating and repeatability
• Universal material compatibility across steel, stainless, cast iron, non-ferrous, and superalloys
• Conforms to ISO 13399 tooling data standards

Compatibility

Designed for use with ISCARTHREAD series external threading toolholders accepting the 27ER insert style with a 5/8 inch inscribed circle. Specific compatible model numbers were not provided in the available product data; verify toolholder pocket geometry and clamping method before installation.

Installation Notes

Installation should be performed by a qualified machinist or CNC toolroom technician with the machine in a locked-out, zero-energy state before any insert change. Seat the insert fully in the toolholder pocket and torque the clamping screw according to the toolholder manufacturer's specification — no torque value is provided here. Inspect the insert seating surface and pocket for chips or debris before clamping, as contamination will affect thread form accuracy. Confirm thread pitch and hand orientation against the part drawing before initiating the threading cycle.