Guhring 9039170021840 Spiral Point Tap 2-64 Unf Tin

Product Description

The GUHRING 9039170021840 is a spiral point tap designed for through-hole threading in steel and similar materials. It cuts a 2-64 UNF right-hand internal thread using a 3-flute spiral point geometry that pushes chips forward ahead of the cutting zone, keeping flutes clear during the threading pass. The plug chamfer provides a gradual lead-in suited to through-hole applications. The tap is manufactured from HSS-E cobalt high-speed steel and finished with a titanium nitride (TiN) coating, which increases surface hardness and reduces friction at the cutting edge. This is a production-grade threading tool installed by machinists, maintenance technicians, and tool-and-die professionals.

This tap is suited to through-hole threading operations in steel workpieces where a 2-64 UNF thread form is required. The H2/H3 thread limit designation indicates a slightly oversize ground thread, which accommodates typical plating allowances and provides a controlled fit tolerance to the 2B class of fit standard. It is appropriate for use in CNC machining centers, drill presses with tapping attachments, and hand-tapping fixtures where chip evacuation ahead of the tap is practical.

Key Features

• Spiral point geometry pushes chips forward, reducing packing in through-hole applications
• HSS-E cobalt base material provides elevated heat and wear resistance compared to standard HSS
• TiN coating reduces cutting friction and extends tool life in steel threading operations
• Plug chamfer offers gradual thread engagement, suitable for through-hole entry
• H2/H3 thread limit accommodates plating stock and holds 2B class of fit tolerance
• Right-hand cut, 64 threads per inch, conforming to UNF thread standard

Compatibility

Designed for through-hole threading in steel at the 2-64 UNF thread size. Compatible with standard tap holders and collet chucks accepting a 0.1410-inch shank diameter. Intended for applications specifying a 2B class of fit with H2/H3 thread limit.

Installation Notes

This tap is installed by machinists or maintenance technicians using a properly sized tap wrench, tapping head, or CNC rigid-tapping cycle. Always drill the correct tap drill size for a 2-64 UNF thread before tapping, and ensure the workpiece is secured to prevent movement. Apply appropriate cutting fluid for the workpiece material to reduce heat buildup and extend tap life. Reverse the tap periodically when hand-tapping to break chips if the operation is not a clean through-hole pass.