Osg 1330400 Standard Pipe Tap 3/8-18 Nps 4 Flute Hss

Product Description

The OSG 1330400 is a standard pipe tap designed to cut 3/8-18 NPS (National Pipe Straight) threads in a range of common metals. Built from high-speed steel with a bright, uncoated finish, it delivers reliable thread-cutting performance in production and maintenance environments. The 4-flute geometry provides balanced chip evacuation and consistent thread form. With an overall length of 2.563 inches and a thread length of 1.063 inches, this tap is sized for standard pipe thread applications. It is used by plumbers, pipefitters, HVAC technicians, and machinists tapping pipe fittings, manifolds, and threaded ports.

The OSG 1330400 is suited for tapping 3/8-18 NPS threads in aluminum, carbon steel, cast iron, and hardened steel. It fits typical applications in plumbing, HVAC, and light industrial settings where straight pipe threads are required for pressure fittings, valves, sensor ports, and threaded pipe connections. The regular hook geometry makes it appropriate for use in both hand-tapping and machine-tapping setups where controlled feed rates can be maintained.

Key Features

• 3/8-18 NPS thread size for straight pipe thread applications
• High-speed steel construction for durability across multiple materials
• 4-flute design promotes balanced chip removal and consistent thread quality
• Bright, uncoated finish suitable for use with standard cutting fluids
• Compatible with aluminum, carbon steel, cast iron, and hardened steel workpieces
• Standard tap type with regular hook for hand or machine tapping

Compatibility

Designed for cutting 3/8-18 NPS straight pipe threads in aluminum, carbon steel, cast iron, and hardened steel workpieces. Suitable for hand-tapping and machine-tapping operations requiring standard NPS thread form.

Installation Notes

This tap is installed by plumbers, pipefitters, HVAC technicians, and machinists. Always secure the workpiece firmly before tapping, and use an appropriate cutting fluid for the material being tapped. For machine tapping, ensure proper alignment to avoid tap breakage. Replace the tap at the first sign of wear or thread-form degradation to maintain joint integrity.