Osg 1651503008 Spiral Point Tap 7/16-20 Unf Ticn

Product Description

The OSG 1651503008 is a high-performance spiral point tap designed to cut internal threads in a wide range of ferrous and non-ferrous materials. It produces a 7/16-20 UNF right-hand thread with a plug chamfer, making it suited for through-hole tapping applications where chips are pushed ahead of the tap rather than backed out. The tap is manufactured from powdered metal (grade PMT15) and finished with a TiCN coating to extend tool life in demanding materials. It carries a 2B class of fit and an H5 thread limit, ensuring threads meet standard tolerance requirements for most fastener applications.

This tap is intended for use in machine tapping operations across general manufacturing, maintenance, and fabrication environments. The spiral point design is best suited for through holes, where the chip stream can exit cleanly ahead of the cutting zone. Material compatibility is broad, covering alloy steel, aluminum, cast aluminum, cast iron, hardened steel, high-carbon steel, low-carbon steel, medium-carbon steel, stainless steel, and die steel. It is used by machinists, tool-and-die makers, and maintenance technicians working with CNC machining centers, drill presses, and tapping machines.

Key Features

• 7/16-20 UNF thread form with right-hand cutting direction
• Powdered metal construction (grade PMT15) for improved wear resistance over standard HSS
• TiCN coating reduces friction and extends tool life in abrasive and hard materials
• Plug chamfer (approximately 3-5 threads) suited for through-hole tapping
• H5 thread limit and 2B class of fit for standard tolerance internal threads
• 3-flute spiral point geometry for efficient chip evacuation in through-hole applications

Compatibility

Compatible with through-hole tapping operations 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

This tap is intended for installation by qualified machinists using CNC machining centers, drill presses, or dedicated tapping machines with appropriate tap holders. Ensure the workpiece is securely fixtured and the spindle speed and feed rate are set per the material being tapped before engaging the tool. Use appropriate cutting fluid or coolant for the workpiece material to reduce heat and extend tool life. Inspect the tap for wear or chipping before each use and replace if cutting edge integrity is compromised.