Osg 1330501 Standard Pipe Tap 1/2-14 Nps 4 Flutes

Product Description

The OSG 1330501 is a standard pipe tap designed to cut 1/2-14 NPS (National Pipe Straight) threads in a variety of metals. With 4 flutes and a high-speed steel construction finished with an oxide coating, this tap delivers reliable thread forming performance in production and maintenance settings. The oxide finish reduces friction and provides a degree of surface protection during cutting. The overall length is 3.126 inches, with a thread length of 1.375 inches and a shank diameter of 0.6875 inches. It is used by plumbers, pipefitters, and machinists who need to tap threaded pipe connections in ferrous and non-ferrous base materials.

This tap is suited for threading pipe fittings, flanges, and manifolds in residential and commercial plumbing and mechanical piping applications. It handles aluminum, carbon steel, and cast iron, and is also rated for use in hardened steel. The regular hook geometry and standard thread profile make it a straightforward choice for shops and field technicians cutting NPS straight pipe threads to standard dimensions.

Key Features

• 1/2-14 NPS thread size for standard pipe connections
• High-speed steel construction for durability across a range of metals
• 4-flute design for efficient chip evacuation during tapping
• Oxide finish reduces friction and provides surface protection
• Compatible with aluminum, carbon steel, cast iron, and hardened steel
• Standard thread profile in OSG Series 109

Compatibility

Designed for cutting 1/2-14 NPS straight pipe threads in aluminum, carbon steel, cast iron, and hardened steel workpieces per the stated material application ratings.

Installation Notes

This tap is installed by machinists, plumbers, or pipefitters using a tap wrench or machine tapping setup. Always ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill size before threading. Apply appropriate cutting fluid for the material being tapped to extend tool life and improve thread quality. Follow applicable IFGC or IPC requirements when tapping fittings for gas or fluid piping systems.