Osg 1200600600 Pipe Tap 1/8-27 Nptf 4 Flutes Hss

Product Description

The OSG 1200600600 is a standard pipe tap designed to cut 1/8-27 NPTF internal pipe threads in metal workpieces. Built from high-speed steel with a bright, uncoated finish, this tap produces tapered dryseal pipe threads that form a pressure-tight mechanical seal without the need for additional sealants. It features 4 flutes with a regular hook for controlled chip evacuation during tapping. The overall length is 2.126 inches with a thread length of 0.75 inches, a shank diameter of 0.4375 inches, and a square drive size of 0.328 inches. It is suited for use by machinists, pipefitters, and plumbing tradespeople working with threaded pipe connections.

This tap is intended for threading 1/8-27 NPTF pipe connections in carbon steel, cast iron, and aluminum workpieces. Typical applications include creating threaded ports in fittings, manifolds, valve bodies, and mechanical assemblies where dryseal pipe thread engagement is required. The 1/8-27 thread size is commonly used for small-diameter hydraulic, pneumatic, and plumbing connections. This is a single-piece, ground-thread pipe tap from OSG Series 12006, sold individually.

Key Features

• 1/8-27 NPTF tapered dryseal pipe thread form for pressure-tight connections
• High-speed steel construction for durability across carbon steel, cast iron, and aluminum
• 4-flute, regular hook geometry supports consistent chip removal during threading
• Bright, uncoated finish allows visual inspection of cutting edge condition
• 0.4375-inch shank diameter with 0.328-inch square drive fits standard tap wrenches and holders
• Compact 2.126-inch overall length suits confined tapping applications

Compatibility

Designed for cutting 1/8-27 NPTF internal pipe threads in carbon steel, cast iron, and aluminum workpieces. Compatible with standard tap wrenches, T-handle holders, and machine tap holders sized for a 0.4375-inch shank diameter.

Installation Notes

This tap is installed by a machinist or pipefitter using a tap wrench or compatible machine holder. Always secure the workpiece and ensure the tap is started square to the hole to prevent thread damage or tap breakage. Use an appropriate cutting fluid for the workpiece material to reduce heat and extend tap life. Follow shop safety practices and machine operating procedures when power tapping.