Thread Tap FANAR M3 DIN 371C R40 EL (6H) HSSE 800

FANAR M3 thread tap DIN 371C R40 EL (6H) HSSE 800 is a hand and machine tapping tool designed for cutting M3 metric internal threads. Produced to DIN 371C form with a partial flute (R40) and tolerance class 6H, this tap is made from HSSE 800 high-speed steel for wear resistance and sharp cutting performance. It is intended for precision tapping in metalworking environments, suitable for production lines and workshops that require consistent M3 internal threads.

Advantages

This FANAR M3 tap combines the DIN 371C profile and a partial flute design to improve chip control when threading blind or through holes. The HSSE 800 material provides enhanced hardness and thermal resistance compared with conventional high-speed steels, extending tool life under repetitive use. The 6H tolerance ensures accurate thread fit for standard metric fasteners, while the R40 flute geometry facilitates reliable engagement and reduced torque during cutting.

Suitable for

• Cutting M3 internal threads in mild steel, alloy steel and non-ferrous metals
• Precision workshop and repair operations requiring consistent thread tolerance
• Production and small-batch machining where tool life and repeatability are important

Key specifications

• Thread size: M3 metric internal thread
• Thread form: DIN 371C
• Flute type: partial flute (R40)
• Tolerance: 6H
• Material: HSSE 800 high-speed steel
• Intended use: hand or machine tapping for precision metalworking

How to use

Select appropriate hole diameter for M3 tapping according to standard drill-size charts, then secure the workpiece to prevent movement. For hand tapping, use a compatible tap wrench and apply steady axial pressure while rotating the tap clockwise; periodically reverse the tap to break chips. For machine tapping, ensure correct spindle alignment and use proper feed rate to match thread pitch. Apply suitable cutting fluid to improve chip evacuation and reduce wear. Monitor tap condition and replace when signs of wear or chipping appear to maintain thread quality.

Usage recommendations

Use this tap with appropriate cutting lubricant for ferrous materials, maintain correct drill-to-tap clearance for M3 threads, and avoid excessive feed or misalignment to preserve tool life and ensure accurate 6H thread fit.