Guhring 9039430031750 Thread Forming Tap 5-40 Unc

Product Description

The GUHRING 9039430031750 is a thread forming tap designed for creating internal 5-40 UNC threads in a range of metallic workpiece materials. Part of the Series 3943 product line, this tap uses a modified bottoming chamfer with 2-3 chamfered threads, making it well-suited for blind hole and through-hole threading applications. It is manufactured from High-Speed Steel-E-CO (cobalt-bearing HSS) and carries a TiCN coating for improved surface hardness and wear resistance. The overall length is 1.941 inches, with a thread limit of H4/H5 and a 2BX class of fit for tighter tolerance threading work. Installation is performed by licensed machinists and tooling technicians in production and maintenance environments.

This tap is engineered for use in blind hole and through-hole threading operations across a variety of materials including steel, stainless steel, cast iron, and non-ferrous metals. The flute-by-diameter ratio is 3xD, and the tap includes 4 oil grooves to assist with lubrication during the forming process. Right-hand thread direction is standard. Typical applications include precision fastener hole preparation in fabrication, aerospace maintenance, and general metalworking where 5-40 UNC thread engagement is required.

Key Features

• Modified bottoming chamfer with 2-3 chamfered threads for close-to-bottom thread forming in blind holes
• TiCN coating provides enhanced wear resistance and reduced friction during tapping
• Cobalt HSS-E-CO base material offers improved heat and wear tolerance over standard HSS
• 4 oil grooves support consistent lubrication along the thread forming surface
• H4/H5 thread limit and 2BX class of fit for controlled tolerance threading
• Compatible with both blind hole and through-hole threading applications

Compatibility

Designed for threading steel, stainless steel, cast iron, and non-ferrous metals. Rated for material application codes P, M, K, and N. Suitable for blind hole and through-hole threading operations requiring a 5-40 UNC thread profile at 2BX class of fit.

Installation Notes

This tap should be installed and used by qualified machinists or tooling technicians familiar with thread forming operations. Always secure the workpiece and confirm spindle speed and feed rate are appropriate for the workpiece material before starting. Use a compatible tapping fluid or cutting oil to maintain lubrication through the oil grooves. Coolant-through is not supported on this tap.