Iscar 5999917 Threading Insert 16 Tpi Un Solid Carbide

Product Description

The ISCAR 5999917 is a laydown-style solid carbide threading insert designed for internal UN thread cutting at 16 threads per inch. Manufactured to ISO 13399 standards, it carries the IC228 grade designation with a PVD-applied TiCN/TiN coating for wear resistance across a broad range of workpiece materials. The insert features a 3/16 inch (0.1875 inch decimal) inscribed circle, a 0.079 inch thickness, and a 0.004 inch corner radius. It is suited for CNC turning centers and manual lathes equipped with compatible toolholders accepting the 08IR insert style. Licensed machinists, toolroom technicians, and production turning operators are the primary users.

This insert is built for right-hand internal UN threading applications. The IC228 grade and PVD coating make it effective across universal workpiece material categories, including steel, stainless, cast iron, non-ferrous, and high-temperature alloys as indicated by the H, K, M, N, P, and S material codes. It fits internal threading operations where a 16 TPI UN profile is required, such as threading bores in hydraulic fittings, fastener components, and fluid system housings. It is sold individually but requires a minimum order quantity of 5 units.

Key Features

• IC228 solid carbide grade with PVD TiCN/TiN coating for extended tool life
• 16 TPI UN internal thread profile, right-hand cut
• 08IR insert style with 3/16 inch inscribed circle (0.1875 inches decimal)
• 0.004 inch corner radius for accurate thread form definition
• Compatible with universal workpiece material codes H, K, M, N, P, and S
• Conforms to ISO 13399 tooling data standards

Compatibility

Designed for use in toolholders accepting the 08IR laydown threading insert style. Compatible with right-hand internal UN threading operations at 16 TPI. No specific machine model or toolholder part numbers were provided in the product data.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine before seating or changing inserts. Use the manufacturer-specified insert seat and clamping hardware for the 08IR style to ensure proper seating depth and clamping force. Do not use a damaged or contaminated insert seat, as this will affect thread form accuracy and insert life.