Guhring 9039090030000 Spiral Flute Tap M3 X 0.50 Tin

Product Description

The GUHRING 9039090030000 is a spiral flute tap designed for blind hole threading in metric coarse applications. Part of the Series 3909 line, it cuts M3 x 0.50 right-hand internal threads to a 6H class of fit with a D3 thread limit. The powdered metal construction and TiN coating deliver extended tool life in demanding materials. The 40-degree helix angle promotes efficient chip evacuation up and out of the blind hole during the tapping cycle. With a modified bottoming chamfer, this tap threads closer to the bottom of the hole than a standard plug tap. Overall length is 1.941 inches. Licensed machinists and tool-and-die professionals are the primary installers.

This tap is rated for use in aerospace alloys and stainless steel, making it well suited for precision machining environments where hole quality and thread accuracy are critical. The modified bottoming geometry is particularly useful in tight-depth applications where thread engagement must start near the base of a drilled hole. The fast flute style helps move chips away from the cutting edge in short-chipping or sticky materials common in aerospace and industrial fabrication shops.

Key Features

• M3 x 0.50 metric coarse thread, 6H class of fit with D3 thread limit
• Modified bottoming chamfer for threading close to the bottom of blind holes
• 40-degree helix angle with fast flute style for efficient chip evacuation
• Powdered metal substrate with TiN finish for hardness and wear resistance
• Rated for aerospace alloys and stainless steel
• Right-hand flute and right-hand thread direction

Compatibility

Designed for blind hole threading in aerospace alloys and stainless steel. Suitable for use in CNC machining centers and manual tapping applications requiring M3 x 0.50 metric coarse threads.

Installation Notes

This tap should be installed in a tapping chuck or rigid holder appropriate for the machine spindle in use. Always ensure the workpiece is securely fixtured and the pilot hole diameter is correct for an M3 x 0.50 thread before beginning the tapping cycle. Apply cutting fluid rated for the workpiece material, particularly when working with stainless steel or aerospace alloys. Do not force or back-drive the tap against resistance, as powdered metal tooling is sensitive to side-loading and breakage.