RUKO MGB-DIN376-HSSCo-vap. M4x0,70 mm strojný závitník

For machinists and metalworkers who need reliable thread cutting in through holes, this RUKO machine tap handles M4 coarse threads in steel, cast iron, and non-ferrous metals. The HSS-Co construction with vaporized surface treatment delivers wear resistance and improved chip flow, while the DIN 376 standard ensures compatibility with common tool holders.

Key specifications

• Tool type: Machine tap
• Thread standard: Metric coarse
• Thread size: M4
• Thread pitch: 0.70 mm
• Standard: DIN 376
• Material: HSS-Co (high-speed steel cobalt)
• Surface treatment: Vaporized (steam treated)
• Tolerance class: ISO 2 (6H)
• Cutting direction: Right-hand
• Overall length: 63 mm
• Thread length: 12 mm
• Shank diameter: 4.5 mm
• Square drive: 3.4 mm
• Flute type: Straight flute
• Number of flutes: 3
• Lead type: Form C (2-3 threads lead)
• Recommended core drill diameter: 3.3 mm
• Manufacturing process: Ground profile

Why choose it

The cobalt alloyed high-speed steel maintains hardness at elevated temperatures, extending tool life in demanding applications. The vaporized surface reduces friction and improves chip evacuation, resulting in cleaner threads and lower torque.

Ideal use cases

• Creating M4 threads in through holes on machining centers
• Production tapping in unalloyed and alloyed steels
• Threading cast iron components
• Working with non-ferrous metals like aluminum and brass

Good to know

This tap is designed for through holes; for blind holes, a different chamfer form is required. The ground profile ensures precise thread geometry and consistent performance.