Hertel R837561T-S Pipe Tap 1-1/4 11-1/2 Npt Hss Tin

Product Description

The HERTEL R837561T-S is a standard NPT pipe tap designed for cutting tapered pipe threads in ferrous and non-ferrous materials. Built from high speed steel with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction during threading operations. The tap features a 1-1/4 - 11-1/2 NPT thread profile with 5 flutes and a short projection design, making it well-suited for production and maintenance environments where consistent thread quality is required. Overall length is 4 inches with a thread length of 1.75 inches. Licensed plumbers and pipefitters are the primary installers of this tool.

This pipe tap is used in applications requiring NPT tapered pipe threads in pipe fittings, couplings, valves, and manifolds across plumbing, HVAC, and industrial piping systems. The 1-1/4 - 11-1/2 NPT size is common in larger-diameter pipe runs found in commercial and light industrial settings. The short projection style suits confined or bench-mounted tapping operations where a compact tool profile improves control and accuracy.

Key Features

• 1-1/4 - 11-1/2 NPT tapered thread profile for standard pipe fitting applications
• High speed steel construction for durability across a range of workpiece materials
• TiN coating reduces friction and extends cutting edge life compared to uncoated HSS
• 5-flute design promotes chip evacuation and smooth thread formation
• Short projection geometry suits bench and machine tapping setups
• 4-inch overall length with 1.75-inch thread length for controlled engagement

Compatibility

Designed for use in standard NPT pipe tapping operations; compatible with tap wrenches and machine tap holders sized to accept a 1.3125-inch shank diameter and 0.9840-inch square drive.

Installation Notes

This tap is installed by licensed plumbers, pipefitters, or machinists performing NPT thread cutting in pipe bodies or fittings. Secure the workpiece firmly before tapping and use an appropriate cutting fluid for the material being threaded. Apply steady, even pressure and back off periodically to break chips and prevent tap binding. Inspect the tap for wear or chipping before each use to avoid thread damage or tool breakage.