Osg 1315601 Pipe Tap 3/4-14 Npt 5 Flute Hss Oxide

Product Description

The OSG 1315601 is a 3/4-14 NPT interrupted thread pipe tap manufactured from high-speed steel with an oxide finish. It is designed for cutting National Pipe Taper threads in a range of materials including aluminum, carbon steel, and cast iron. The interrupted thread geometry reduces cutting forces and helps clear chips more efficiently than standard thread taps, making it well suited for blind and through-hole pipe thread applications. With 5 flutes, a modified bottoming chamfer, and a regular hook, this tap delivers controlled thread engagement in production and repair tapping operations. It is sized at 3.252 inches overall length with a shank diameter of 0.9063 inches.

This tap is used in metalworking shops, maintenance facilities, and manufacturing environments where NPT pipe thread connections must be cut into workpieces. The modified bottoming chamfer allows threading closer to the bottom of a hole than a standard taper chamfer, making it a practical choice when thread depth is limited. The interrupted thread design is especially effective in harder materials like cast iron and hardened steel where chip packing is a concern. It is sold individually and suited for use in both manual and machine tapping setups.

Key Features

• 3/4-14 NPT thread form for standard tapered pipe thread applications
• Interrupted thread design reduces cutting forces and improves chip evacuation
• Modified bottoming chamfer allows threading closer to hole bottom
• High-speed steel construction with oxide finish for general-purpose durability
• 5-flute configuration for balanced cutting action across multiple material types
• Compatible with aluminum, carbon steel, cast iron, and hardened steel

Compatibility

Designed for tapping 3/4-14 NPT threads in aluminum, carbon steel, cast iron, and hardened steel workpieces. Part of OSG Series 108G.

Installation Notes

This tap is installed and operated by machinists or maintenance technicians using a tap wrench, tapping head, or CNC machine spindle. Always ensure the workpiece is securely fixtured and that the correct tap drill size for 3/4-14 NPT has been used prior to tapping. Apply appropriate cutting fluid for the material being tapped to extend tool life and improve thread finish. Inspect the tap for wear or chipping before each use and replace if cutting edges are degraded.