Carmex 16ER20UNBXC Threading Insert 20 Tpi 3/8 Inch Un

Product Description

The CARMEX 16ER20UNBXC is a laydown threading insert designed for external UN thread cutting on CNC lathes and turning centers. Manufactured from solid carbide with a PVD-applied TiN coating, this insert delivers consistent thread form geometry at 20 threads per inch with a 60-degree included angle. The 3/8 inch inscribed circle and 0.146 inch thickness conform to the 16ER insert style standard. It is intended for right-hand external threading operations and is suited for use by machinists and toolroom technicians working with UN-standard threaded components across a broad range of workpiece materials.

This insert is rated for universal workpiece material compatibility, covering material codes H, K, M, N, P, and S, which correspond to hardened steels, cast irons, stainless steels, non-ferrous metals, carbon and alloy steels, and heat-resistant superalloys. Typical applications include external thread turning on shafts, fasteners, fittings, and precision turned parts in production or job-shop environments. The 16ER insert style fits toolholders designed to the corresponding ER-style laydown seat specification.

Key Features

• Solid carbide substrate with PVD TiN coating for wear resistance across diverse materials
• 20 TPI thread pitch with 60-degree included angle for UN thread form accuracy
• Right-hand external threading geometry for standard lathe thread-turning operations
• 3/8 inch inscribed circle, 0.146 inch thickness - 16ER insert style dimensions
• Universal material compatibility covering steels, cast iron, stainless, non-ferrous, and superalloys
• Meets CE, ISO 13485:2016, ISO 14001:2015, and ISO 45001 standards

Compatibility

Designed for use in 16ER-style laydown threading toolholders that accept the ER seat configuration. Compatible with turning centers and CNC lathes equipped with external threading toolholders matching the 16ER insert seat geometry.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the machine is in a safe, locked-out state before changing inserts. Seat the insert firmly against the toolholder pocket and tighten the clamping screw to the toolholder manufacturer's specified torque using the appropriate Torx or hex key. Verify insert seating and thread form with a test pass before committing to production runs.