Guhring 9039110031750 Spiral Flute Tap 5-44 Unf Tin

Product Description

The GUHRING 9039110031750 is a spiral flute tap designed for blind hole threading in demanding materials including aerospace alloys and stainless steel. It is a 5-44 UNF, 3-flute tap ground from powdered metal and finished with a TiN (titanium nitride) coating for extended tool life and reduced friction. The modified bottoming chamfer allows threading close to the bottom of a blind hole, and the fast flute style with a 40-degree helix angle efficiently evacuates chips up and out of the cut. The 2B class of fit delivers standard tolerance threads suitable for most UNF fastener applications. Overall length is 1.941 inches. This tap is installed by machinists and toolroom technicians in production and maintenance environments.

This tap is suited for blind hole threading operations in materials that work-harden or generate stringy chips, such as austenitic stainless steel and aerospace-grade alloys. The 40-degree spiral flute geometry pulls chips out of the hole during the tapping cycle, reducing the risk of chip packing and tap breakage. The TiN finish improves surface hardness and lubricity, making this tool effective in both CNC tapping centers and manual tap handles where cutting fluid is applied. It is well-suited for short-run aerospace, defense, and precision manufacturing applications where thread quality and tool reliability are critical.

Key Features

• 5-44 UNF thread form with 2B class of fit for standard tolerance blind hole threads
• Modified bottoming chamfer for threading near the bottom of blind holes
• 40-degree helix angle with fast flute style for efficient chip evacuation in tough materials
• Powdered metal construction with TiN coating for extended wear resistance
• Right-hand flute, right-hand thread; no coolant-through requirement
• Thread limits H2 and H3 for flexible tolerance range

Compatibility

Rated for use in aerospace alloys and stainless steel per manufacturer specifications. Designed as an OEM-style replacement or direct-use spiral flute tap for Series 3911 tooling applications requiring 5-44 UNF threads in blind holes.

Installation Notes

This tap is installed by machinists and toolroom technicians using a tapping chuck, CNC rigid tapping cycle, or a T-handle tap wrench sized for the 0.110-inch square drive. Ensure the workpiece is securely fixtured and that an appropriate cutting fluid or tapping compound is applied before starting the thread. Always back the tap out periodically to clear chips when tapping manually. Follow shop safety procedures and verify spindle direction before engaging the tap in a machine tool.