Guhring 9039080158750 Spiral Point Tap 5/8-18 Unf

Product Description

The GUHRING 9039080158750 is a spiral point tap designed for through-hole threading in a 5/8-18 UNF thread form. Built from High-Speed Steel-E-PM (a powder-metallurgy HSS grade) and finished with a TiN coating, this tap delivers consistent thread cutting performance in demanding materials including stainless steel. It features a plug chamfer, 4 flutes, a 2B class of fit, and an H4/H5 thread limit. With an overall length of 3.811 inches and a thread length of 0.866 inches, it fits standard tap holders used in machining and maintenance environments. Part of the Guhring Series 3908, it is intended for use by machinists and maintenance technicians requiring precise metric-to-inch unified threads.

This tap is suited for through-hole threading applications in materials such as stainless steel where tool wear resistance is critical. The TiN coating reduces friction and extends tool life compared to uncoated HSS taps. The spiral point design pushes chips forward ahead of the tap, making it well-suited for through-hole work in production and repair environments. It is appropriate for use in manual tapping operations as well as CNC and drill-press setups where coolant-through is not required.

Key Features

• 5/8-18 UNF thread form with 2B class of fit for standard tolerance threading
• Spiral point geometry pushes chips ahead of the cutting zone, optimized for through-hole applications
• TiN coating reduces friction and improves tool life in abrasive and stainless steel materials
• Powder-metallurgy High-Speed Steel (HSS-E-PM) construction for higher wear resistance than standard HSS
• H4/H5 thread limit provides controlled oversize for plated or tight-tolerance applications
• Right-hand thread direction, no coolant-through requirement

Compatibility

Designed for through-hole threading of 5/8-18 UNF threads in stainless steel and similar materials. Compatible with standard tap holders and collet chucks accepting a 0.48-inch shank diameter. No specific interrupted-thread or oversize compatibility is noted for this tap.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician using appropriate tap holders or collet chucks. Ensure the workpiece is securely fixtured and the spindle or tapping head is properly aligned before beginning the tapping cycle. Use a suitable cutting fluid or tapping compound for stainless steel to reduce heat and tool wear. Do not exceed the tap's rated feed rate or force the tap if resistance increases unexpectedly, as this can result in breakage.