Guhring 9039040031750 Spiral Flute Tap 5-40 Unc

Product Description

The GUHRING 9039040031750 is a cobalt spiral flute tap designed for blind hole threading in a range of ferrous and non-ferrous materials. Built to UNC standards at a 5-40 thread size, it features a modified bottoming chamfer and a 40-degree helix angle that channels chips up and out of the hole during the tapping cycle. With a 2B class of fit and a three-flute fast flute style, this tap produces threads suitable for most standard fastener applications. The bright, uncoated finish is appropriate for use across the material applications listed in the specs section. Overall length is 1.941 inches, and shank diameter is 0.141 inches.

This tap is intended for blind hole threading operations in materials including aluminum and other non-ferrous metals, gray cast iron, malleable and spheroidal iron, and steel. The modified bottoming chamfer allows threading closer to the bottom of a blind hole than a standard taper or plug chamfer, making it well suited for applications where thread depth is critical. It is appropriate for use in precision machining environments, toolroom work, and production tapping where consistent 2B tolerance threads are required.

Key Features

• 5-40 UNC thread form with 2B class of fit for standard fastener compatibility
• Modified bottoming chamfer for threading near the base of blind holes
• 40-degree helix angle with fast flute style for efficient chip evacuation
• Cobalt construction provides wear resistance across ferrous and non-ferrous materials
• Right-hand flute and right-hand thread orientation
• Bright, uncoated finish — no coolant-through required

Compatibility

Designed for blind hole threading in aluminum and other non-ferrous metals, gray cast iron, malleable and spheroidal iron, and steel. Part of GUHRING Series 3904.

Installation Notes

Installation is performed by machinists and toolroom technicians using standard tapping equipment, CNC machining centers, or hand tap handles. Power down or disengage the spindle before loading or unloading the tap. Ensure the workpiece is firmly fixtured and the tap is properly aligned to avoid tap breakage, particularly in blind hole applications where bottoming clearance is minimal. Follow the machine manufacturer and tooling recommendations for tapping speeds appropriate to the workpiece material.