Hertel G837530T-S Pipe Tap 1/4-18 Nptf 4 Flute Hss Tin

Product Description

The HERTEL G837530T-S is a standard pipe tap designed to cut 1/4-18 NPTF (National Pipe Taper Fuel) threads in metal workpieces. Built from high-speed steel (HSS) and finished with a titanium nitride (TiN) coating, this tap delivers improved surface hardness and heat resistance compared to uncoated HSS tooling. The short projection design makes it well suited for close-tolerance work where clearance is limited. With four flutes and a thread length of 1.0625 inches, it produces clean, accurate tapered pipe threads that form pressure-tight seals when used with appropriate fittings.

This tap is used in machine shops, maintenance facilities, and field service applications where NPTF pipe threads must be cut into ferrous and non-ferrous metals. It is a common choice for plumbing, hydraulic, and pneumatic fittings work performed by machinists, pipefitters, and maintenance technicians. The 0.5625-inch shank diameter accommodates standard tap holders and machine spindles used in drill press and CNC tapping operations.

Key Features

• 1/4-18 NPTF thread form for pressure-tight pipe connections
• High-speed steel construction for durability across a range of workpiece materials
• Titanium nitride (TiN) coating increases surface hardness and extends tool life
• Four-flute design for efficient chip evacuation in through and blind hole applications
• Short projection style for use in restricted-clearance setups
• 0.5625-inch shank diameter fits standard tap holders and machine spindles

Compatibility

Designed for use with standard tap holders, drill presses, and CNC tapping heads that accept a 0.5625-inch shank diameter. Cuts 1/4-18 NPTF tapered pipe threads in accordance with ANSI/ASME B1.20.3 standards.

Installation Notes

Tapping should be performed by a qualified machinist or technician using appropriate cutting fluid for the workpiece material. Secure the workpiece firmly before beginning the tapping operation and ensure the tap is properly aligned to avoid thread distortion or tap breakage. Use a calibrated torque-limited tap holder where possible to reduce the risk of overload. Follow shop safety procedures and applicable OSHA standards when operating rotating machinery.