M12 machine-tap DIN 376 C 6H HSSE-Co5 voor roestvrij staal

Machine tap with metric coarse thread M12 × 1.75 mm, tolerance class 6H, and chamfer form C (2–3 threads lead-in) for through holes. Manufactured from HSSE-Co5 high-speed steel with 5% cobalt, this tap delivers high wear resistance and heat hardness when threading stainless steel (INOX), alloyed steels, and other tough materials. The 40° right-hand spiral flute efficiently evacuates chips upward, preventing clogging and ensuring a clean thread profile. Reinforced shank (9.0 mm) and square drive (7.0 mm) provide stable clamping and torque transmission. Conforms to DIN 376.

Advantages

HSSE-Co5 cobalt alloyed steel offers significantly longer tool life and higher cutting speeds compared to standard HSS. The spiral flute design is ideal for through holes, pulling chips away from the workpiece and reducing the risk of tap breakage. The 6H tolerance ensures a precise, standard-compliant internal thread for metric fasteners. The reinforced shank increases rigidity, minimising deflection during machining.

Suitable for

• Stainless steel (INOX) components
• Alloyed and high-strength steels
• Through-hole threading operations
• Machine tapping on CNC or conventional machines

Key specifications

• Thread size: M12 × 1.75 mm (metric coarse)
• Tolerance class: 6H
• Standard: DIN 376
• Chamfer form: C (2–3 threads lead-in)
• Material: HSSE-Co5 (5% cobalt)
• Flute type: Spiral flute, 40° right-hand helix
• Shank diameter: 9.0 mm, square drive: 7.0 mm
• Overall length: 110 mm, thread length: 29 mm
• Cutting direction: Right-hand

Recommendations

For optimal performance in stainless steel, use a suitable cutting fluid and maintain recommended cutting speeds. Ensure proper alignment and secure clamping to prevent tap breakage.