Osg 1315300 Pipe Tap 1/4-18 Npt 5 Flute Hss Bright

Product Description

The OSG 1315300 is a 1/4-18 NPT interrupted thread pipe tap manufactured from high-speed steel with a bright finish. It is designed for cutting tapered pipe threads in a range of materials encountered in trade and industrial applications. The interrupted thread geometry reduces chip packing and cutting torque, making it well suited for deeper or blind-hole pipe thread applications. With 5 flutes and a modified bottoming chamfer, this tap starts threads close to the bottom of a tapped hole while maintaining cutting efficiency. The bright finish provides a smooth surface without added coating, keeping costs down for general-purpose use. Licensed machinists, pipefitters, and maintenance technicians are the primary users of this tool.

This tap is used for tapping 1/4-18 NPT pipe threads in materials including aluminum, carbon steel, cast iron, and hardened steel. It fits standard tapping applications on Series 108G tooling setups. The modified bottoming chamfer makes it practical for situations where thread engagement must begin near the base of a hole, common in pipe fitting and manifold work across plumbing, HVAC, and industrial maintenance environments.

Key Features

• Interrupted thread design reduces chip loading and cutting torque
• 5 flutes provide good chip clearance across a range of materials
• Modified bottoming chamfer allows thread cutting closer to the base of a hole
• High-speed steel construction handles aluminum, carbon steel, cast iron, and hardened steel
• Bright finish for general-purpose use without coating overhead
• 1/4-18 NPT thread form meets standard tapered pipe thread specifications

Compatibility

Designed for tapping 1/4-18 NPT pipe threads in aluminum, carbon steel, cast iron, and hardened steel workpieces. Part of the OSG Series 108G tap line.

Installation Notes

This tap is installed and operated by machinists, pipefitters, or maintenance technicians using a tap wrench, tapping head, or CNC machine tool. Ensure the workpiece is securely fixtured and the tap is properly aligned to the drilled hole before beginning the tapping cycle. Use appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Inspect the tap for wear or damage before each use and do not force a worn or broken tap.