Guhring 9039920054860 Spiral Point Tap 12-24 Unc

Product Description

The GUHRING 9039920054860 is a spiral point tap designed for right-hand through-hole threading in a 12-24 UNC configuration. Built from High-Speed Steel-E-PM (powder metallurgy HSS) with a TiN coating, it delivers extended tool life and consistent thread quality in demanding production environments. The plug chamfer eases entry into pre-drilled holes, and the 3-flute geometry channels chips forward ahead of the tap, keeping the thread form clean during the cut. With an overall length of 3.15 inches and a thread length of 1.024 inches, this tap suits standard machine tapping setups on CNC machining centers, drill presses, and tapping machines. It is intended for installation by machinists and tool-and-die professionals.

This tap is rated for threading steel, stainless steel, hardened steel, and chilled cast iron, making it a practical choice across general machining, fabrication, and maintenance-repair-overhaul (MRO) applications. The 2B class of fit produces standard commercial thread tolerances suitable for most fastener and assembly applications. The H3/H4 thread limit provides the oversize tolerance needed to accommodate TiN coating buildup while maintaining proper fit. It is not suited for interrupted-thread or coolant-through applications. The Series 3992 designation places it within a consistent product family for reorder and tooling management.

Key Features

• 12-24 UNC thread form with right-hand spiral point geometry for through-hole threading
• High-Speed Steel-E-PM construction for improved wear resistance over standard HSS
• TiN coating reduces friction and extends tool life in ferrous materials
• Plug chamfer for easy hole entry and smooth thread start
• H3/H4 thread limit matched to 2B class of fit with TiN coating allowance
• Compatible with steel, stainless steel, hardened steel, and chilled cast iron

Compatibility

Designed for through-hole threading applications in steel, stainless steel, hardened steel, and chilled cast iron workpieces requiring a 12-24 UNC, 2B class of fit thread. Not designed for blind-hole or coolant-through applications.

Installation Notes

This tap should be installed and operated by qualified machinists following standard tapping procedures. Ensure the spindle is fully stopped and the machine is de-energized before changing tooling. Use appropriate cutting fluid for the workpiece material to reduce heat buildup and extend tap life. Verify correct tap drill size for 12-24 UNC prior to tapping to avoid overloading the flutes.