Osg 1701401 Spiral Point Tap 7/16-14 Unc 3 Flutes

Product Description

The OSG 1701401 is a spiral point tap designed for threading 7/16-14 UNC holes in demanding metalworking applications. Built from powdered metal with a steam oxide coating, this plug-chamfer tap drives chips forward ahead of the cutting zone, making it well suited for through-hole tapping operations. With 3 flutes and a right-hand thread direction, it operates at a thread limit of H5 for controlled fit tolerance. Overall length measures 3.157 inches, and the thread length is 0.893 inches. Licensed machinists, toolroom operators, and CNC setup technicians use this tap where consistent thread quality in tough alloys is required.

This tap is intended for through-hole applications in hard-to-machine materials including hardened steel, stainless steel, high-nickel alloy, titanium, alloy steel, and die steel. The spiral point geometry pushes chips forward rather than packing them into flutes, reducing the risk of tap breakage in these demanding materials. It is appropriate for both manual and machine tapping setups in production and maintenance environments where 7/16-14 UNC threads are specified.

Key Features

• 7/16-14 UNC thread size with right-hand thread direction
• Powdered metal construction for improved wear resistance in hard alloys
• Steam oxide coating reduces friction and provides light corrosion protection
• Spiral point geometry drives chips forward — optimized for through-hole tapping
• H5 thread limit for controlled oversize tolerance and consistent fit
• 3 flutes with plug chamfer for gradual thread engagement on entry

Compatibility

Designed for through-hole tapping of 7/16-14 UNC threads in hardened steel, stainless steel, high-nickel alloy, titanium, alloy steel, and die steel workpieces. Coolant-through is not supported on this tap.

Installation Notes

This tap should be installed in a properly aligned tap holder or CNC rigid-tapping chuck to prevent thread angle deviation. Always ensure the workpiece is securely fixtured and the spindle is powered down before changing tooling. Use an appropriate cutting fluid or tapping compound for the workpiece material to extend tool life and improve thread finish. Follow shop safety practices and applicable OSHA standards when operating tapping equipment.