Hertel 16ERZ27NPHG330T Threading Insert 27 Tpi Npt

Product Description

The HERTEL 16ERZ27NPHG330T is a laydown-style threading insert designed for cutting external NPT (National Pipe Taper) threads on a lathe or CNC turning center. Built from solid carbide with a PVD-applied TiAlN coating, it delivers the heat resistance and edge integrity required for consistent thread form in production and job-shop environments. The insert carries a 3/8 inch inscribed circle, a thickness of 0.1614 inches (4.10 mm), and cuts at 27 threads per inch in a right-hand orientation. It is installed and indexed by machinists and CNC operators working in metalworking, pipe fabrication, and mechanical assembly applications.

This insert is suited for external NPT thread turning on pipe, fittings, and threaded components where a tapered pipe thread form is required. The 27 TPI specification corresponds to standard NPT thread pitches used on smaller-diameter pipe and fitting stock. The TiAlN coating supports dry or minimal-lubrication cutting and extends tool life when threading steel, stainless, and similar ferrous alloys. It is sold individually and must be ordered in multiples of 10 to meet the minimum order quantity requirement.

Key Features

• Solid carbide substrate for rigid, consistent thread form
• TiAlN PVD coating for elevated heat resistance and extended edge life
• 27 TPI for standard NPT tapered pipe thread cutting
• 3/8 inch inscribed circle for compatibility with standard 16ER-style toolholders
• Right-hand, external thread orientation
• Laydown insert geometry for secure, repeatable seating

Compatibility

Designed for use in 16ER-style laydown threading toolholders requiring a 3/8 inch inscribed circle insert for external NPT thread turning operations.

Installation Notes

Installation is performed by machinists using appropriate torx or hex drive tooling as specified by the toolholder manufacturer — do not exceed the toolholder manufacturer's recommended clamping torque. Ensure the machine spindle is fully stopped and the toolholder is secured in the turret before indexing or replacing the insert. Verify the insert is fully seated in the pocket with no rocking before engaging the workpiece. Confirm thread pitch and taper settings on the machine control before beginning the threading pass.