Guhring 9039400031750 Thread Forming Tap 5-40 Unc

Product Description

The GUHRING 9039400031750 is a thread forming tap designed for cutting 5-40 UNC internal threads in blind and through-hole applications. It is manufactured from High-Speed Steel-E-CO (cobalt-enhanced HSS) and carries a Titanium Nitride (TiN) coating for extended tool life and reduced friction during tapping. The modified bottoming chamfer features 2-3 chamfered threads, allowing threading close to the bottom of blind holes. With an overall length of 1.941 inches and a thread length of 0.433 inches, this tap fits standard toolholding setups used in machining and maintenance operations. It is installed by machinists, tool and die makers, and maintenance technicians working in precision threading applications.

This tap is suited for use in steel, stainless steel, cast iron, and non-ferrous metals, covering material application codes P, M, K, and N. It is built for both blind hole and through-hole threading scenarios where a 5-40 UNC, 2BX class of fit is required. The H4/H5 thread limit designation makes it appropriate for applications demanding controlled thread tolerance. The 3xD flute-by-diameter ratio and four oil grooves support chip management and lubrication during the forming process. This tap is part of the GUHRING Series 3940 product line.

Key Features

• 5-40 UNC thread size with 2BX class of fit and H4/H5 thread limit
• Modified bottoming chamfer with 2-3 chamfered threads for threading close to hole bottoms
• High-Speed Steel-E-CO (cobalt) construction for improved heat and wear resistance
• Titanium Nitride (TiN) coating reduces friction and extends tool life
• Four oil grooves promote lubrication and chip flow during tapping
• Compatible with blind hole and through-hole threading applications across multiple material types

Compatibility

Designed for threading steel, stainless steel, cast iron, and non-ferrous metals in blind hole and through-hole configurations requiring a 5-40 UNC thread form at 2BX class of fit.

Installation Notes

This tap is installed by machinists and maintenance technicians using standard tapping equipment or CNC machining centers. Always secure the workpiece and use appropriate cutting fluid or tapping lubricant to protect the tool and work material. Power down or de-energize any machine before manually chucking or changing tooling. Follow the machine manufacturer guidelines for spindle speed and feed rate when tapping 5-40 UNC threads in the specified material types.