Guhring 9044052035050 Spiral Point Tap 6-40 Unf

Product Description

The GUHRING 9044052035050 is a spiral point tap designed for cutting internal threads in through-hole applications. Built from HSS-E cobalt high-speed steel and finished with a steam oxide coating, this tap handles steel threading work with reduced friction and improved chip evacuation. It cuts a 6-40 UNF right-hand thread with a plug chamfer entry and meets 2B and 3B class of fit tolerances. The spiral point geometry pushes chips forward ahead of the cutting zone, making it well suited for through-hole work where chip buildup can cause tap breakage. Thread limit is H3/H4. Overall length is 2 inches.

This tap is intended for through-hole threading operations in steel workpieces. At the 6-40 UNF thread size, it is commonly used in precision machining, tool and die work, light mechanical assemblies, and instrument manufacturing where fine-thread engagement is required in small-diameter holes. It is installed by machinists and tool and die makers using a tap wrench, CNC tapping attachment, or machine spindle setup. The steam oxide finish provides a mild lubricity benefit and helps resist built-up edge during tapping.

Key Features

• Spiral point geometry pushes chips forward, reducing clogging in through-hole applications
• HSS-E cobalt construction provides increased heat and wear resistance compared to standard HSS
• Steam oxide coating reduces friction and helps prevent galling in steel
• Plug chamfer provides a gradual thread lead-in suitable for most general through-hole tapping
• Cuts to 2B and 3B class of fit tolerances with H3/H4 thread limit
• 3-flute design balances chip load and tool strength at this thread size

Compatibility

Designed for through-hole threading of 6-40 UNF internal threads in steel. Suitable for use with standard tap wrenches, tapping heads, and CNC machine spindles configured for the 6-40 thread size and the shank diameter of 0.141 inches.

Installation Notes

This tap is installed by qualified machinists or tool and die professionals. Before tapping, verify the drilled hole diameter matches the recommended tap drill size for 6-40 UNF to achieve the intended thread engagement. Apply cutting fluid appropriate for steel when tapping to extend tool life and improve thread finish. Do not reverse the tap under load without relieving cutting pressure, and do not force the tap if resistance increases unexpectedly, as tap breakage in small diameters is difficult to recover from.