Guhring 9039960158750 Spiral Point Tap 5/8-11 Unc

Product Description

The GUHRING 9039960158750 is a spiral point tap designed for through-hole threading in ferrous and hard-to-machine materials including stainless steel. It carries a 5/8-11 UNC thread form with a plug chamfer, 4 flutes, and a right-hand thread direction. The tap is manufactured from powdered metal for increased wear resistance and edge toughness, and carries a TiN (titanium nitride) coating to reduce friction and extend tool life in production threading applications. Overall length is 3.811 inches with a shank diameter of 0.480 inches. This tap belongs to GUHRING Series 3997 and is intended for use by machinists, tool-and-die tradespeople, and maintenance professionals requiring consistent, repeatable thread quality.

This tap is suited for through-hole threading operations in machine shop, manufacturing, and industrial maintenance environments. Its spiral point geometry pushes chips forward ahead of the cutting zone, making it particularly effective in through-hole applications where chip evacuation is critical. The H3 thread limit and Class 3B fit designation indicate a tolerance range appropriate for standard close-tolerance fastener assemblies. Primary material application is stainless steel, though the TiN-coated powdered metal construction also performs in other demanding ferrous materials.

Key Features

• 5/8-11 UNC thread form with plug chamfer for gradual thread engagement at entry
• 4-flute spiral point geometry pushes chips forward, optimizing through-hole chip evacuation
• Powdered metal construction provides enhanced hardness and edge retention over conventional HSS
• TiN coating reduces cutting friction and extends tap service life in stainless steel applications
• H3 thread limit with Class 3B fit for close-tolerance thread production
• Right-hand thread direction, no coolant-through capability, non-oversize designation

Compatibility

Designed for through-hole threading operations in stainless steel and comparable ferrous materials; fits standard 5/8-inch tap holders and chucks accepting a 0.480-inch shank diameter.

Installation Notes

Installation and use of this tap should be performed by qualified machinists or maintenance technicians familiar with tapping procedures and machine tool operation. Secure the workpiece fully before threading and ensure the tap holder is properly aligned to avoid tap breakage or thread distortion. Use an appropriate cutting fluid for stainless steel to reduce heat buildup and galling. Follow shop safety protocols and consult machine manufacturer guidelines for spindle speed and feed rate selection.