Osg 3370010323 Spiral Point Tap 10-32 Unf Plug Hr Coated

Product Description

The OSG 3370010323 is a spiral point tap designed for cutting internal 10-32 UNF threads in demanding metalworking applications. Built from powdered metal and finished with an HR coating, this tap delivers extended tool life in tough materials including hardened steel, stainless steel, and high-nickel alloys. The plug chamfer design allows progressive thread engagement at the start of the cut. With 3 flutes and a right-hand thread direction, it is suited for use in through-hole applications where chips are pushed forward ahead of the tap. Licensed machinists and toolroom technicians use this tap in manual and CNC tapping operations requiring tight thread tolerances.

This tap is rated for a 2B class of fit with an H3 thread limit, making it appropriate for standard-tolerance internal thread production in production and maintenance environments. Typical applications include threading holes in hardened steel components, stainless steel assemblies, and high-nickel alloy parts where standard high-speed steel taps wear prematurely. The HR coating reduces friction and heat buildup during cutting, extending service intervals in high-cycle production runs. It carries OSG series designation 337NI, indicating it is engineered specifically for nickel-alloy and difficult-to-machine material families.

Key Features

• 10-32 UNF thread form with 2B class of fit and H3 thread limit for standard-tolerance internal threads
• Powdered metal construction for improved wear resistance over conventional HSS in abrasive materials
• HR coating reduces friction and extends tool life in hardened steel, stainless steel, and high-nickel alloys
• Plug chamfer for controlled thread engagement in through-hole tapping operations
• 3-flute spiral point geometry pushes chips forward, reducing clogging in through-hole applications
• Right-hand thread direction, non-coolant-through design

Compatibility

Designed for tapping 10-32 UNF through holes in hardened steel, stainless steel, and high-nickel alloy workpieces. Part of the OSG 337NI series for difficult-to-machine materials. Confirm hole preparation diameter against 10-32 UNF tap drill specifications before use.

Installation Notes

Tapping operations should be performed by qualified machinists following standard shop safety procedures. Ensure the workpiece is securely fixtured and the tap is properly aligned to the pre-drilled hole before engagement. Use appropriate cutting fluid rated for the workpiece material, particularly when tapping stainless steel or high-nickel alloys, to manage heat and extend tap life. Inspect the tap for chipping or wear before each use and replace if cutting edges are degraded.