Carmex 16IR8UNC-5/P30 Threading Insert 8 Tpi Solid Carbide

Product Description

The CARMEX 16IR8UNC-5/P30 is a solid carbide laydown threading insert designed for right-hand internal UN thread cutting at 8 threads per inch. Built from uncoated solid carbide in manufacturer grade P30 and material grade C5, this insert delivers consistent thread form geometry with a 60-degree included angle. The 3/8 inch inscribed circle and 0.146 inch thickness place it in the 16IR insert style, sized for standard indexable threading toolholders. Machinists and CNC operators use this insert for internal threading operations across a broad range of workpiece materials.

This insert is suited for internal UN thread machining on a variety of workpiece material categories, including steels, stainless steels, cast irons, non-ferrous metals, high-temp alloys, and general-purpose materials. The uncoated solid carbide construction is well matched to applications where sharp edge retention and direct thermal feedback are priorities. It is commonly used in production and job-shop environments where consistent UN thread form on internal bores is required.

Key Features

• Solid carbide uncoated construction for sharp, precise thread form cutting
• Right-hand internal UN thread profile at 8 TPI with 60-degree included angle
• 16IR insert style with 3/8 inch inscribed circle and 0.146 inch thickness
• Manufacturer grade P30 / material grade C5 for broad material compatibility
• Compatible with multiple workpiece material categories: H, K, M, N, P, S
• Certified to CE, ISO 13485:2016, ISO 14001:2015, and ISO 45001 standards

Compatibility

Designed to fit standard indexable threading toolholders accepting the 16IR laydown insert style for right-hand internal UN thread applications. Workpiece material codes H, K, M, N, P, and S are supported as stated by the manufacturer.

Installation Notes

Installation and indexing should be performed by a qualified machinist or CNC operator with the machine fully powered down and in a safe state before insert handling. Use the appropriate torx or insert-clamping wrench as specified by the toolholder manufacturer - do not overtighten the clamping screw. Inspect the insert seat and clamping pocket for chips or debris before seating the insert. Follow your facility safety procedures and toolholder OEM documentation for proper torque and setup.