Osg 1315500 Pipe Tap 1/2-14 Npt 5 Flute Hss Bright

Product Description

The OSG 1315500 is a 1/2-14 NPT interrupted thread pipe tap designed for cutting tapered pipe threads in a range of ferrous and non-ferrous materials. Built from high-speed steel with a bright finish, this tap features five flutes and a modified bottoming chamfer for controlled thread engagement at the bottom of a tapped hole. The interrupted thread geometry reduces cutting torque and improves chip evacuation, making it well-suited for production tapping environments where tool life and thread quality are critical. The shank diameter measures 0.6875 inches and the square drive size is 0.515 inches, compatible with standard tap wrenches and machine holders.

This pipe tap is intended for threading pipe fittings, manifolds, couplings, and ported housings in both manual and machine tapping applications. It is appropriate for use in repair shops, fabrication facilities, and production lines where NPT tapered pipe threads are required. Compatible materials include aluminum, carbon steel, cast iron, and hardened steel. The modified bottoming chamfer allows the tap to start threads closer to the bottom of a blind or semi-blind hole than a standard taper pipe tap.

Key Features

• 1/2-14 NPT tapered pipe thread form for standard pressure-rated pipe fittings
• Interrupted thread design lowers cutting torque and promotes chip clearing
• Five flutes for efficient chip evacuation in a range of materials
• Modified bottoming chamfer for threading closer to hole bottom
• High-speed steel construction with bright finish for general-purpose tapping
• Series 108G with regular hook geometry for consistent thread form

Compatibility

Designed for tapping 1/2-14 NPT threads in aluminum, carbon steel, cast iron, and hardened steel workpieces using standard tap wrenches or machine tapping fixtures that accept a 0.6875-inch shank with a 0.515-inch square drive.

Installation Notes

This tap should be installed by a machinist or trained technician familiar with pipe thread tapping procedures. Ensure the workpiece is securely fixtured and that the correct drill size for 1/2-14 NPT has been used prior to tapping. Apply appropriate cutting fluid for the workpiece material to extend tap life and improve thread finish. Inspect the tap for wear or chipping before each use and replace if cutting edges show damage.