Hertel R867349-S Pipe Tap 1-11/2 Nptf 5 Flute Hss

Product Description

The HERTEL R867349-S is a 1 to 11-1/2 NPTF interrupted thread pipe tap made from high speed steel with a bright finish. It is designed to cut tapered pipe threads that conform to the National Pipe Taper Fuel (NPTF) standard, producing a pressure-tight seal without sealant. The interrupted thread design reduces chip packing and cutting torque, particularly in tough or long-chipping materials. With 5 flutes and an overall length of 3.75 inches, this tap is well suited to production and maintenance environments where thread quality and tool life both matter. Licensed plumbers, pipefitters, and machinists use this tool for threading pipe ends and fittings in fuel, hydraulic, and fluid-handling assemblies.

This tap is used when a dryseal NPTF thread form is required in pipe, fittings, or manifold bodies. Common applications include threading steel pipe ends, cast iron fittings, and machined aluminum or steel manifolds in plumbing, HVAC, and industrial fluid systems. The NPTF thread form provides a dryseal mechanical fit and is specified in many fuel line, compressed air, and hydraulic circuits where thread leakage is not acceptable. The interrupted flute geometry makes it especially practical for blind holes or materials that produce stringy chips.

Key Features

• NPTF thread standard produces a dryseal pressure-tight thread without additional sealant
• Interrupted thread geometry reduces chip packing and lowers cutting torque
• 5-flute configuration provides good chip clearance and thread finish
• High speed steel construction provides toughness across a range of workpiece materials
• Bright finish with no coating preserves close dimensional tolerances on the cutting profile
• Overall length of 3.75 inches accommodates standard pipe tap holders and machines

Compatibility

Designed for use in any application requiring a 1 to 11-1/2 NPTF dryseal tapered pipe thread. Fits standard pipe tap holders and CNC or manual tapping machines accepting this thread size and tap body dimensions.

Installation Notes

This tap is installed and operated by licensed plumbers, pipefitters, or machinists using a tap wrench, tapping machine, or CNC spindle. Secure the workpiece firmly and use an appropriate cutting fluid for the workpiece material before starting the tap. Back the tap out periodically to clear chips, especially in deep holes or stringy materials. Inspect the tap for wear or chipping before each use and replace if cutting edges are damaged to avoid thread form errors.