RUKO MGB-DIN376-HSSCo-vap. M18x2.50mm Machine Tap for Through Holes

For machinists cutting M18 coarse threads in through holes on steel, cast iron, or non-ferrous metals, this RUKO machine tap delivers reliable performance. The HSSCo (cobalt high-speed steel) body with steam-tempered surface offers good wear resistance and chip evacuation in production environments.

Key specifications

• Thread: M18 x 2.50 mm, metric coarse
• Standard: DIN 376
• Material: HSSCo (high-speed steel with cobalt)
• Surface: steam-tempered (oxidized)
• Application: through holes
• Cutting direction: right-hand
• Tolerance class: ISO 2 (6H)
• Total length: 125 mm
• Thread length: 35 mm
• Shank diameter: 14 mm
• Square drive: 11 mm
• Number of flutes: 4
• Recommended core hole diameter: 15.5 mm
• Suitable for steels up to 800 N/mm², cast iron, non-ferrous metals
• Coolant: oil or emulsion
• Manufacturing process: ground profile

Why choose it

The cobalt alloyed steel withstands higher cutting temperatures than standard HSS, making it suitable for tougher materials. The steam-tempered finish reduces friction and improves chip flow, while the DIN 376 geometry ensures consistent thread quality.

Ideal use cases

• Threading through holes in steel components
• Maintenance and repair work on cast iron parts
• Batch production in non-ferrous metals
• Use with tapping oil or emulsion coolant

Good to know

For through holes, the tap's design allows chips to be pushed forward, reducing the risk of clogging. Always use the recommended core hole diameter of 15.5 mm for M18x2.50 threads.