M4x0.7mm Machine Tap DIN 371B HSS-Co5 Form B Straight Flute ISO2 6H Through Holes - Ruko GmbH

Take advantage of the combination of high‑performance HSS‑Co5 substrate, precise ISO 2 (6H) tolerance and a chamfered lead for smooth through threading; order directly via Metav Werkzeuge or contact the consultants for application advice.

Ruko Machine Tap DIN 371B M4 x 0.7 — HSS‑Co5, Form B, straight flute

Ruko Machine Tap DIN 371B M4 x 0.7 designed for metric ISO threads in steels and non‑ferrous metals, ideal for workshop and production machine applications

• HSS‑Co5 high‑cobalt construction
• Straight flute Form B geometry
• Relieved flanks for smoother cutting
• For alloyed and unalloyed steels

Precision threading that fits industrial workflows

The Ruko machine tap conforms to DIN 371B and produces M4 x 0.7 metric ISO threads to ISO 2 (6H) tolerance, delivering reproducible thread quality for serial production. Made from HSS‑Co5, the tool offers elevated red hardness and wear resistance compared with standard high‑speed steel, which reduces regrinding frequency and supports a predictable production rhythm. The straight flute geometry and relieved flanks promote chip evacuation in through‑hole operations, lowering the risk of chip jamming and ensuring consistent thread form across batches.

Material compatibility and machining advantages

Engineered for a wide range of substrates, the tap is suitable for unalloyed and alloyed steels up to 1000 N/mm² tensile strength, malleable cast iron and common non‑ferrous metals. The chamfered lead for through threads eases thread entry and reduces axial load on the spindle, which is particularly beneficial when machining thinner workpieces or stacked plates. The right‑hand cutting direction and shank Ø 4.5 mm make the tool straightforward to clamp in standard tool holders and tapping heads, facilitating fast changeovers and minimal setup effort.

Practical benefits: reliability, life and efficiency

In everyday use the combination of cobalt‑alloyed steel and Form B straight flutes translates into extended tool life and stable cutting performance, lowering downtime and per‑component cost. The tolerance class ISO 2 (6H) ensures interchangeability with mating screws and nuts in mechanical assemblies, reducing post‑process rework. For workshops seeking dependable metric threading with predictable tool behaviour, this machine tap provides a robust, low‑maintenance solution that supports continuous production.

For tailored advice or to secure supply of the Ruko machine tap M4 x 0.7 (SKU 4000601922NW), contact Metav Werkzeuge for technical consultation and fast dispatch: info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: 4000601922NW
• Product label: Maschinengewindebohrer DIN 371B M4x0,7mm HSS‑Co5 6H RUKO
• Manufacturer: Ruko GmbH

Facts

• Thread size: M4 x 0.7
• Shank diameter: 4.5 mm
• Tensile strength capability: up to 1000 N/mm²
• Tolerance: ISO 2 (6H)

Special features

• HSS‑Co5 cobalt alloy
• Form B
• Straight fluted
• Relieved flanks
• Metric ISO thread (DIN 13 Sheet 1)
• Chamfered lead for through threads
• Right‑hand cutting
• Suitable for unalloyed and alloyed steels, malleable cast iron and non‑ferrous metals

FAQ

What materials can be machined with this tap?
The Ruko machine tap M4 x 0.7 is suitable for unalloyed and alloyed steels up to 1000 N/mm², malleable cast iron and common non‑ferrous metals.

Is the tap suitable for through holes or blind holes?
The tool features a chamfered lead designed specifically for through threads, making it particularly effective for through‑hole tapping in production settings.

What tolerance class does the tap achieve?
This tap produces threads to ISO 2 (6H) tolerance, ensuring good interchangeability with standard metric fasteners.

How does the HSS‑Co5 material affect tool life?
The HSS‑Co5 composition increases red hardness and wear resistance, which extends tool life and reduces the need for frequent replacement in continuous operations.

Which holder or shank size is required for clamping?
The tap has a shank Ø 4.5 mm, compatible with standard collets and tapping heads designed for small‑diameter machine taps.

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