Guhring 9039160054860 Spiral Point Tap 12-24 Unc Tin Hss-e

Product Description

The GUHRING 9039160054860 is a spiral point tap designed for through-hole threading in steel and similar materials. It carries a 12-24 UNC thread form with 3 flutes and a plug chamfer, making it well suited for initiating threads in pre-drilled through-holes. The tap is manufactured from HSS-E cobalt high-speed steel for improved heat and wear resistance, and it receives a TiN (titanium nitride) coating to further extend tool life and reduce friction at the cutting edge. The 2B class of fit and H3/H4 thread limit ensure the finished thread meets standard tolerance requirements for most production and MRO fastening applications.

This tap is intended for use in metal fabrication, machine shops, and maintenance environments where 12-24 UNC threaded holes are produced in steel workpieces. The spiral point geometry pushes chips forward ahead of the tap, keeping the flutes clear during through-hole operations. It is appropriate for use in CNC tapping centers, drill presses with tapping attachments, and hand-tapping setups. Right-hand thread direction is standard for conventional 12-24 UNC fastener engagement.

Key Features

• 12-24 UNC thread form with right-hand thread direction
• HSS-E cobalt construction for elevated heat resistance compared to standard HSS
• TiN coating reduces friction and extends cutting life in steel applications
• Plug chamfer provides a gradual lead-in suitable for through-hole threading
• 3-flute spiral point design pushes chips forward to clear the cutting zone
• H3/H4 thread limit and 2B class of fit for consistent tolerance control

Compatibility

Designed for through-hole threading applications in steel. Fits standard tap holders and tapping chucks sized for a 0.2200-inch shank diameter in the 12-24 UNC size range.

Installation Notes

This tap should be installed by a machinist or qualified tradesperson using a properly sized tap holder or tapping chuck that matches the 0.2200-inch shank. Ensure the workpiece is securely fixtured and the tap is aligned perpendicular to the hole before starting the cut. Use an appropriate tapping fluid or cutting oil for steel to maintain tool life and thread quality. Do not force the tap if resistance increases unexpectedly — back out to clear chips before continuing.