Hertel G127437-S 3/8-18 Npt Pipe Tap 5 Flute Hss

Product Description

The HERTEL G127437-S is an interrupted thread pipe tap designed to cut 3/8-18 NPT internal threads in ferrous and non-ferrous materials. The interrupted thread geometry reduces cutting torque and helps clear chips more efficiently than a standard continuous-thread tap, making it well suited for tapping blind or difficult-to-clear holes. Built from high-speed steel with a bright uncoated finish, this tap delivers reliable performance across a range of shop and field tapping applications. The 5-flute design distributes cutting load evenly and contributes to consistent thread form. Overall length is 2.5625 inches.

This tap is used by machinists, pipefitters, and plumbers to produce NPT taper pipe threads in pipe fittings, manifolds, valve bodies, and hydraulic or pneumatic ports. The 3/8-18 NPT designation refers to a 3/8-inch nominal pipe size with 18 threads per inch and a standard NPT taper. It is appropriate for light to medium production work and maintenance environments where threaded pipe connections must be cut by hand or with a tapping machine.

Key Features

• Interrupted thread geometry reduces torque and aids chip evacuation
• 3/8-18 NPT taper pipe thread standard for leak-resistant pipe connections
• 5-flute configuration distributes cutting forces for consistent thread form
• High-speed steel construction suitable for steel, cast iron, and non-ferrous materials
• Bright uncoated finish for general-purpose use without added coating cost
• Compact 2.5625-inch overall length for use in standard tap wrenches and machines

Compatibility

Designed as an OEM-style replacement or direct-use tap for any application requiring 3/8-18 NPT internal threads, compatible with standard tap wrenches, tapping heads, and machine spindles accepting the corresponding tap shank size.

Installation Notes

This tap should be installed and operated by a qualified machinist, pipefitter, or plumber familiar with thread-cutting procedures. Always secure the workpiece firmly and use appropriate cutting fluid for the material being tapped to extend tool life and improve thread quality. Inspect the tap for wear or chipping before each use and replace if cutting edges are compromised. Follow applicable shop safety practices and relevant trade codes when producing threaded pipe connections.