M8x1.25mm Machine Tap DIN 371C HSS-Co5 Form C Right-Hand 35° Flank Relief ISO2 (6H), Blind Hole - Ruko GmbH

Take advantage of the combination of hard-wearing HSS‑Co5 material, precise ISO2 (6H) thread tolerance and a 35° right‑hand spiral for reliable blind‑hole performance; order the tap directly via Metav Werkzeuge or consult our specialists for application advice.

Machine tap DIN 371C M8×1.25 HSS‑Co5 – RUKO

The Machine tap DIN 371C M8×1.25 HSS‑Co5 RUKO is a metric ISO machine tap designed for producing precise M8 threads in blind holes across a range of steels and non‑ferrous materials

• HSS‑Co5 high cobalt alloy for durability
• Right‑hand 35° spiral for reliable chip evacuation
• Flank‑ground cutting edges for precise threads
• Suitable for blind holes and ISO metric M8×1.25

Durable alloy and geometry for sustained production

The use of HSS‑Co5 places wear resistance and thermal stability at the centre of the tool’s performance, extending tool life under continuous machining. The Form C geometry, combined with flank‑ground cutting edges, reduces friction during thread cutting and supports consistent thread form generation. Operators benefit from fewer tool changes and a steadier process capability, which contributes to predictable uptime and a lower cost per thread in series production.

Accurate metric threads with machine‑grade tolerance control

Designed to the DIN 371C specification, the tap delivers M8×1.25 metric threads with ISO2 (6H) tolerance for dependable fit‑up in assemblies. The 35° right‑hand spiral supports effective chip control in blind‑hole threading, preventing chip packing and improving surface finish. Thanks to the precise geometry and cutting direction, this machine tap produces threads that meet tight dimensional requirements, reducing rework and ensuring interchangeability of threaded parts.

Practical integration and workshop advantages

With a shank Ø 8 mm and right‑hand cutting, the tap is suitable for standard machine tool holders and automated tapping spindles, enabling straightforward integration into existing production cells. The tool is suitable for unalloyed and alloyed steels up to 1000 N/mm² tensile strength, temper cast iron and various non‑ferrous metals, offering a versatile solution across small‑batch and industrial applications. The combination of material selection and geometry promotes process reliability and consistent thread quality for demanding workshop environments.

For application guidance or to place an order for RUKO machine taps, contact Metav Werkzeuge in Emmerich at info@metav-werkzeuge.com or +49 2822 7131930 for personalised advice and supply options

Technical data

• Article number: 4000601997NW
• Product label: Machine tap DIN 371C M8×1.25 HSS‑Co5 RUKO
• Packaging unit: 1

Core specifications

• Thread: M8 × 1.25 mm
• Shank Ø: 8 mm
• Spiral angle: 35°
• Tolerance: ISO2 (6H)
• Suitable tensile strength up to: 1000 N/mm²

Design and features

• Material: HSS‑Co5 (high cobalt high‑speed steel)
• Form C
• Right‑hand cutting
• Flank‑ground cutting edges
• For blind‑hole threading
• For unalloyed and alloyed steels, temper cast iron and non‑ferrous metals

FAQ

What materials can this tap process effectively?
The Machine tap DIN 371C M8×1.25 HSS‑Co5 RUKO is designed for unalloyed and alloyed steels up to 1000 N/mm² tensile strength, temper cast iron and various non‑ferrous metals.

Is this tap suitable for blind holes or through holes?
The geometry of the RUKO DIN 371C tap, including the 35° spiral, is optimised for blind‑hole threading to improve chip evacuation and reduce the risk of chip packing.

What tolerance and thread quality does the tap achieve?
The tap produces M8×1.25 threads to ISO2 (6H) tolerance, delivering consistent thread form and reliable fit for precision assemblies.

What shank size and machine compatibility does it offer?
This tap features a shank Ø 8 mm, compatible with standard machine holders and tapping spindles commonly used in production workshops.

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