Hertel R843770-S Pipe Tap 2-11/2 Nps 7 Flute Hss

Product Description

The HERTEL R843770-S is a standard pipe tap designed to cut National Pipe Straight (NPS) threads in metal workpieces. Built from high speed steel (HSS), this tap produces a 2 - 11-1/2 NPS thread form across a 1.75 inch thread length. Seven flutes provide clean chip evacuation and consistent thread geometry. The bright, uncoated finish makes it compatible with a wide range of cutting fluids. This tool is used by plumbers, pipefitters, and machinists threading pipe fittings, manifolds, and mechanical housings in trade and industrial settings.

This pipe tap is suited for threading ferrous and non-ferrous materials where a standard NPS thread profile is required. Typical applications include threading pipe ports in hydraulic and pneumatic manifolds, fabricating threaded fittings, and maintenance work on mechanical systems. The 2 - 11-1/2 NPS designation means a 2 inch nominal pipe size with 11.5 threads per inch. The shank diameter of 1.875 inches and square drive size of 1.406 inches are sized for use with standard tap wrenches or machine holders appropriate for large-diameter taps.

Key Features

• 2 - 11-1/2 NPS thread form for standard pipe connections
• High speed steel construction for durability across a range of materials
• 7 flutes for efficient chip clearance and consistent thread cutting
• 1.75 inch thread length suitable for full pipe thread engagement
• Bright uncoated finish compatible with most cutting fluids
• 1.875 inch shank diameter fits standard large-tap holders and wrenches

Compatibility

Designed as an OEM-style replacement or direct-use pipe tap for applications requiring a 2 - 11-1/2 NPS thread standard in ferrous and non-ferrous workpieces.

Installation Notes

Pipe taps of this size are typically installed by pipefitters, machinists, or plumbers using a heavy-duty tap wrench or machine tapping setup. Always apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Secure the workpiece firmly before threading to prevent movement. Reverse the tap periodically during use to break and clear chips, especially in deeper holes.