Guhring 9039070063500 Spiral Point Tap 1/4-20 Unc Tin

Product Description

The GUHRING 9039070063500 is a spiral point tap designed for right-hand through-hole threading in 1/4-20 UNC applications. Manufactured from High-Speed Steel-E-PM (HSS-E-PM) with a Titanium Nitride (TiN) coating, this tap is built for cutting threads in stainless steel and other demanding materials. It features 3 flutes, a plug chamfer for gradual thread engagement, and a 2B class of fit with an H4/H5 thread limit. Overall length is 2.5 inches, with a thread length of 0.63 inches. Licensed machinists and tool-and-die techs reach for this tap when cutting clean, accurate machine threads in production and maintenance environments.

This tap is suited for through-hole threading operations in stainless steel across both production machining and maintenance repair contexts. The spiral point design pushes chips forward ahead of the tap, making it well-suited for through-holes where chip evacuation is critical. The plug chamfer provides a gradual lead-in, reducing initial cutting force and improving thread quality. It is appropriate for use in manual tapping machines, CNC machining centers, and drill press setups requiring consistent 1/4-20 UNC thread form.

Key Features

• Spiral point geometry pushes chips forward, optimized for through-hole threading
• HSS-E-PM base material provides wear resistance and toughness in stainless steel applications
• TiN coating reduces friction and extends tool life in abrasive materials
• Plug chamfer with 3 flutes for gradual thread engagement and reduced entry force
• 2B class of fit with H4/H5 thread limit for standard UNC tolerance compliance
• Right-hand thread direction, no coolant-through, non-oversize construction

Compatibility

Designed for 1/4-20 UNC through-hole threading applications, particularly in stainless steel. Part of the GUHRING Series 3907 spiral point tap line.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician familiar with threading operations. Always secure the workpiece and ensure the spindle is aligned perpendicular to the hole before beginning. Apply appropriate cutting fluid for the workpiece material, particularly when working with stainless steel, to reduce heat buildup and extend tap life. Never force a tap that has stalled — back off to clear chips before continuing.