Guhring 9039030020000 Spiral Flute Tap M2 X 0.40 Cobalt

Product Description

The GUHRING 9039030020000 is a spiral flute tap designed for metric coarse internal threading in blind hole applications. Built from cobalt high-speed steel with a bright, uncoated finish, this tap handles a wide range of materials including aluminum and other non-ferrous metals, gray cast iron, malleable and spheroidal iron, and steel. It cuts an M2 x 0.40 thread to a 6H class of fit with a D3 thread limit. The modified bottoming chamfer allows threading closer to the bottom of blind holes, and the fast flute style with a 40-degree helix angle efficiently evacuates chips upward during the cut. Overall length is 1.752 inches. Licensed machinists and tool and die makers are the primary users of this tap.

This tap is suited for production and maintenance threading operations where M2 x 0.40 metric coarse blind holes are required. The 40-degree helix angle and spiral flute geometry make it well matched to short-chipping materials such as cast iron as well as longer-chipping non-ferrous metals. It is a right-hand flute, right-hand thread tool from GUHRING Series 3903, intended for use in CNC machining centers, drill presses, and tapping machines where consistent thread quality and hole-bottom reach are required.

Key Features

• M2 x 0.40 metric coarse thread form, 6H class of fit, D3 thread limit for precise tolerance control
• Modified bottoming chamfer for threading close to the bottom of blind holes
• 40-degree helix angle fast spiral flute design for efficient chip evacuation
• Cobalt HSS construction for improved heat and wear resistance across a broad material range
• Bright, uncoated finish suitable for use with standard cutting fluids
• Right-hand flute and right-hand thread — standard CW rotation

Compatibility

Rated for use in aluminum and other non-ferrous metals, gray cast iron, malleable and spheroidal iron, and steel. Designed as a blind hole threading tap within GUHRING Series 3903.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician familiar with tapping operations. Secure the workpiece and ensure the spindle is properly aligned before engaging the tap to avoid thread misalignment or tap breakage. Always use an appropriate cutting fluid for the material being tapped. Given the small M2 diameter, use a calibrated torque-controlled tapping attachment or CNC rigid tapping cycle to minimize the risk of tap breakage.