Guhring 9039610063500 Spiral Point Tap 1/4-20 Unc

Product Description

The GUHRING 9039610063500 is a spiral point tap designed for through-hole threading in steel and similarly machinable materials. Built from HSS-E cobalt high-speed steel and finished with a MolyGlide coating, this tap delivers improved wear resistance and reduced friction during the cutting cycle. It is configured with a plug chamfer, 3 flutes, and a right-hand thread direction. The 1/4-20 UNC thread profile and 2B class of fit make it a standard choice for general-purpose machine tapping where consistent thread quality is required. Machinists and tool-room technicians will find it suited to both manual and CNC tapping applications.

This tap is intended for through-hole threading operations in ferrous metals, particularly steel. The spiral point geometry pushes chips forward ahead of the tap, keeping flutes clear and reducing the risk of chip packing in blind-hole approaches. It is appropriate for production environments and job-shop use where 1/4-20 UNC threads are required at volume. No coolant-through capability is present, so flood or brush-applied cutting fluid should be used at the spindle. The H4/H5 thread limit designation targets a standard 2B fit tolerance.

Key Features

• HSS-E cobalt construction for extended tool life in steel applications
• MolyGlide coating reduces friction and built-up edge during tapping
• Spiral point geometry pushes chips forward, suited for through-hole threading
• Plug chamfer provides a gradual lead-in for machine tapping
• H4/H5 thread limit produces a consistent 2B class of fit
• Right-hand thread direction, compatible with standard tapping heads and CNC spindles

Compatibility

Designed for through-hole threading applications requiring a 1/4-20 UNC thread profile with a 2B class of fit. Suitable for use in steel and similar ferrous materials per the manufacturer material application designation.

Installation Notes

This tap is installed by a machinist or tool-room technician in a tapping chuck, tapping head, or rigid CNC spindle holder. Ensure the workpiece is securely fixtured and the spindle speed is set to values appropriate for the material and tap diameter before starting the cycle. Apply cutting fluid generously when coolant-through is not available to prevent galling and premature wear. Inspect thread form periodically against a 2B thread gauge to confirm the tap has not drifted out of tolerance.