Osg 1205300408 Pipe Tap 3/8-18 Npt 5 Flute

Product Description

The OSG 1205300408 is an interrupted thread pipe tap designed to cut 3/8-18 NPT tapered pipe threads in a range of ferrous materials. The interrupted thread geometry reduces cutting forces and helps clear chips more efficiently than standard continuous-thread taps, making it well suited for production tapping and difficult materials. With 5 flutes and a V-coating finish, this tap provides consistent thread form across its 1.062-inch thread length. The overall length of 2.563 inches and a 0.7-inch shank diameter make it compatible with standard tap holders and machine spindles. It is sold individually and is intended for use in machine tapping operations.

This tap is used in shops and field operations where NPT pipe threads must be cut into carbon steel, cast iron, die steel, or stainless steel workpieces. Typical applications include creating threaded ports in pipe fittings, manifolds, valve bodies, and mechanical assemblies that require pressure-rated tapered pipe thread connections. HVAC, plumbing, and industrial piping fabricators rely on NPT taps like this one to produce leak-resistant threaded joints in both production and repair scenarios.

Key Features

• Interrupted thread design reduces torque and improves chip evacuation during tapping
• 3/8-18 NPT thread standard for tapered pipe thread connections
• 5-flute geometry for improved chip clearance in tough materials
• V-coating finish for extended tool life and reduced friction
• Compatible with carbon steel, cast iron, die steel, and stainless steel workpieces
• Shank diameter of 0.7 inches fits standard tap holders and machine spindles

Compatibility

Designed for machine tapping applications requiring 3/8-18 NPT threads in carbon steel, cast iron, die steel, and stainless steel. Fits standard tap holders sized for a 0.7-inch shank diameter.

Installation Notes

This tap is intended for use by machinists and trade professionals operating drill presses, CNC machining centers, or tapping machines. Ensure the workpiece is securely fixtured and the tap is properly aligned before beginning the cut. Use an appropriate cutting fluid for the material being tapped to extend tool life and improve thread quality. Follow all machine guarding and lockout procedures before changing or setting tooling.