Hertel H05766860 Threading Insert 27 Tpi Nptf Solid Carbide

Product Description

The HERTEL H05766860 is a solid carbide laydown threading insert designed for external NPTF thread cutting at 27 threads per inch (TPI). Built to the 16ER insert style with a right-hand orientation, it carries a TiC/TiN multilayer coating that extends cutting edge life in ferrous and alloy materials. The 3/8-inch inscribed circle and 0.146-inch thickness conform to standard laydown seating geometry, making it a direct fit for compatible 16ER toolholders. Machinists and toolroom technicians install this insert for pipe thread work on CNC lathes and manual turning centers where NPTF thread accuracy is required for pressure-tight connections.

This insert is suited to external NPTF pipe thread applications in production and maintenance machining environments. NPTF threads rely on thread-form interference rather than a sealant compound to achieve a pressure-tight joint, so accurate form geometry is critical. The H05766860 is appropriate for machining carbon steel, alloy steel, and similar ferrous workpieces where a TiC/TiN coated solid carbide insert provides the hardness and thermal resistance needed at production feed rates. It is sold individually; minimum order quantity is 10 pieces per order.

Key Features

• Solid carbide substrate for high hardness and wear resistance in ferrous threading applications
• TiC/TiN multilayer coating reduces built-up edge and extends tool life
• 27 TPI NPTF thread form produces pressure-tight pipe connections without sealant
• Right-hand external thread geometry in the 16ER insert style
• 3/8-inch inscribed circle fits standard 16ER laydown toolholders
• Zero-degree relief angle suits laydown-style insert pockets

Compatibility

Designed for use in 16ER-style laydown threading toolholders that accept a 3/8-inch inscribed circle insert with a 0.146-inch seating thickness and zero-degree relief angle.

Installation Notes

Insert replacement should be performed by a qualified machinist with the machine fully stopped and the spindle locked out per facility lockout/tagout procedures. Seat the insert firmly in the pocket and verify the clamping screw torque is consistent with the toolholder manufacturer specification before taking a cut. Inspect the insert pocket and clamping components for chips or wear before seating a new insert. Confirm thread-form accuracy with a NPTF thread gauge after the first part to verify setup before running production quantities.