Hertel K015980AS25 Extension Pipe Tap 1/2-14 Nptf Hss Tin

Product Description

The HERTEL K015980AS25 is an extension pipe tap designed to cut 1/2-14 NPTF tapered pipe threads in metal workpieces. It is manufactured from high speed steel with a titanium nitride (TiN) coating that increases surface hardness and extends tool life in production threading applications. The tap features 5 flutes and an interrupted thread geometry that helps break chips and reduce torque during cutting. With a 6-inch overall length and a 0.6875-inch shank diameter, it reaches into recessed or deep-bore locations where standard-length pipe taps cannot access. Machinists and pipefitters use this tool in metalworking shops, maintenance facilities, and fabrication environments requiring tight, pressure-rated pipe thread connections.

This extension pipe tap is suited for threading 1/2-14 NPTF connections in steel, cast iron, and similar ferrous materials. The NPTF thread standard produces a dry-seal fit, making it appropriate for hydraulic, pneumatic, and fluid-transfer fittings where thread-form sealing is required without relying solely on sealant tape. The extended reach is valuable when threading ports in housings, manifolds, or assemblies where the workpiece depth prevents use of a conventional tap. It is used in both manual tapping operations with a tap wrench and machine tapping setups on drill presses, lathes, and CNC machining centers.

Key Features

• 1/2-14 NPTF thread standard produces a dry-seal tapered pipe thread
• 5-flute interrupted thread design reduces cutting torque and improves chip evacuation
• High speed steel construction provides toughness across a wide range of ferrous workpiece materials
• TiN coating increases surface hardness and reduces friction for extended tool life
• 6-inch overall length allows threading in deep or recessed port locations
• 0.6875-inch shank diameter with 0.515-inch square drive for secure tap wrench or machine holder engagement

Compatibility

Designed as a standard extension pipe tap for use in manual tap wrenches and machine tapping setups that accept a 0.6875-inch round shank with a 0.515-inch square drive end, suitable for cutting 1/2-14 NPTF threads in ferrous and compatible non-ferrous materials.

Installation Notes

This tap should be installed by a qualified machinist or pipefitter familiar with threading operations and proper cutting fluid application. Always secure the workpiece and use appropriate cutting oil or tapping fluid to reduce heat and extend tool life. Verify that the starting hole diameter and depth conform to published NPTF tap drill recommendations before beginning the threading operation. Inspect the tap for chipping or wear before each use and replace if the cutting edges show damage to avoid thread-form errors or tap breakage.