Machine-tap M12x1.25 DIN 374B (6H) HSSE 800

On a busy shop floor, a machinist picks up this M12x1.25 tap to cut clean, precise threads in a through hole on a steel bracket. The tool bites smoothly, thanks to its HSSE cobalt steel and Form B lead, leaving a tolerance class 6H thread ready for assembly.

Key specifications

• Thread: Metric fine, M12 x 1.25 mm pitch
• Standard: DIN 374B, tolerance class 6H
• Material: HSSE (high-speed steel with cobalt) for high strength
• Chamfer form: B (4-5 threads lead) for through holes
• Overall length: 110 mm, thread length: 25 mm
• Shank diameter: 9 mm, square drive: 7 mm
• Straight flute, uncoated, right-hand cut
• Recommended for steels up to 800 N/mm², cast iron, non-ferrous metals

Why choose it

The reinforced shank and cobalt steel construction give this tap extra durability and heat resistance, making it a reliable choice for production work. The Form B lead reduces cutting torque, allowing faster threading with less effort. It delivers consistent 6H tolerance threads, ensuring your fasteners fit perfectly every time.

Ideal use cases

• Threading through holes in steel plates and brackets
• Maintenance and repair of machinery with metric fine threads
• Fabrication of jigs, fixtures, and custom parts
• Working with cast iron and non-ferrous metals like aluminum

Good to know

Use a suitable cutting fluid for best results and longer tool life. The tap is designed for machine tapping, but can also be used by hand with a proper tap wrench. Always ensure the hole diameter matches the recommended drill size for M12x1.25 threads.