8mm Machine Tap DIN 371B M8x1.25 HSS Form B Straight Flute ISO2 (6H) - Ruko GmbH

Take advantage of the proven combination of precision thread tolerance, robust HSS cutting performance and geometry optimised for machine tapping to maintain a smooth production flow. Order the tap directly via Metav Werkzeuge or consult our specialists for process parameters.

Machine tap DIN 371B M8 x 1.25 mm HSS 6H RUKO — straight-flute, Form B, ISO tolerance

A RUKO machine tap DIN 371B M8 x 1.25 mm designed for efficient production of metric ISO through-threads in unalloyed and low-alloy steels, malleable cast iron and non-ferrous metals.

• HSS, Form B with straight flutes
• Flanks ground for higher thread precision
• Peel chamfer for reliable through-threads
• Shaft Ø 8 mm, right-hand cutting direction

Consistent fit and interchangeability for assembly lines

The tool follows DIN 371B with tolerance field ISO2 (6H), ensuring threads meet standardised dimensional and tolerance requirements. Ground flanks and the machine tap’s metric ISO geometry deliver reproducible results, which reduces the need for rework and minimises scrap parts in assembly processes. This stability in thread quality supports component interchangeability across production batches and supplier parts.

Robust tool material for common workshop alloys

Manufactured from HSS and built to Form B specifications, the tap balances toughness and wear resistance for industrial use. It is specified for machining unalloyed and low-alloy steels up to 800 N/mm², as well as malleable cast iron and non-ferrous metals, permitting longer runs between tool changes. The combination of substrate and geometry yields reliable cutting behaviour in everyday workshop materials, improving uptime and productivity.

Geometry optimised for machine-driven tapping

Straight flutes and a peel chamfer make the tool especially suitable for through-hole thread production by promoting consistent chip evacuation and reducing jamming during automatic cycles. The shaft Ø 8 mm and right-hand cutting direction align with common machine holders and spindle set-ups, enabling straightforward integration into existing tapping stations. These features together contribute to predictable cycle times and a reduction in process interruptions.

Contact Metav Werkzeuge for tailored machining recommendations and to secure this RUKO machine tap from our Emmerich stock.

Technical data

• Article number: 4000601892NW
• Name: Machine tap DIN 371B M8 x 1.25 mm HSS 6H RUKO
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Dimensions / Core data

• Thread size: M8 x 1.25 mm
• Shaft diameter: 8 mm
• Tolerance: ISO2 (6H)
• Maximum recommended tensile strength: 800 N/mm²
• Cutting direction: right-hand

Materials & special features

• HSS material
• Form B
• Straight flutes
• Flanks ground
• Peel chamfer for through-threads
• Suitable for unalloyed and low-alloy steels, malleable cast iron and non-ferrous metals

FAQ

Which materials can this tap machine?
The RUKO machine tap M8 x 1.25 mm is specified for unalloyed and low-alloy steels up to 800 N/mm², malleable cast iron and non-ferrous metals.

What standard and tolerance does the tap meet?
Threads produced with this tool conform to DIN 371B and DIN 13 Blatt 1, with the ISO2 (6H) tolerance field for metric ISO threads.

Is the tap designed for through-threads or blind holes?
The built-in peel chamfer is intended for reliable machining of through-threads, improving chip flow in through-hole operations.

What are the shaft and cutting direction specifications?
Shaft diameter is 8 mm and the tool is right-hand cutting, compatible with standard machine-holding systems.

Manufacturer/Responsible: Ruko GmbH Präzisionswerkzeuge, Robert-Bosch-Strasse 7, 71088 Holzgerlingen