Osg 1651502908 Spiral Point Tap 7/16-14 Unc Ticn

Product Description

The OSG 1651502908 is a high-performance spiral point tap designed for cutting right-hand internal threads to a 7/16-14 UNC specification. Built from powdered metal (grade PMT15) and finished with a TiCN coating, this tap delivers consistent thread quality across a wide range of ferrous and non-ferrous materials. The plug chamfer style makes it well suited for through-hole tapping applications. With a 3-flute design and H3 thread limit, it holds tight tolerances to a Class 3B fit, meeting the demands of precision machining environments. It carries an overall length of 3.937 inches and a thread length of 0.858 inches.

This tap is intended for production and maintenance machining in shops, job sites, and manufacturing facilities. It handles a broad material range including alloy steel, low-carbon steel, medium-carbon steel, high-carbon steel, stainless steel, cast iron, cast aluminum, and die steel. The TiCN coating reduces friction and improves wear resistance, making it a practical choice for higher-volume threading operations. Licensed machinists, tool and die makers, and maintenance mechanics are the primary users. It is not designed for coolant-through delivery.

Key Features

• 7/16-14 UNC thread form with Class 3B fit and H3 thread limit for precision tolerance control
• Powdered metal construction (grade PMT15) provides superior wear resistance over standard HSS
• TiCN coating reduces built-up edge and extends tool life across abrasive materials
• Plug chamfer style optimized for through-hole tapping applications
• 3-flute configuration promotes efficient chip evacuation in spiral point geometry
• Compatible with a wide material range including stainless steel, cast iron, hardened steel, and aluminum alloys

Compatibility

Rated for use in alloy steel, aluminum, cast aluminum, cast iron, hardened steel, high-carbon steel, low-carbon steel, medium-carbon steel, stainless steel, and die steel. Part of OSG Series 16515.

Installation Notes

Spiral point taps are installed and operated by machinists using CNC machining centers, drill presses, or tapping machines. Before mounting, ensure the spindle is fully stopped and the workpiece is securely fixtured. Select the correct tap drill size for 7/16-14 UNC thread engagement before beginning. Coolant-through delivery is not supported on this tap; use an appropriate cutting fluid applied externally for the workpiece material.