M20x2.5mm Machine Tap DIN 376B HSS-Co5 Form B Straight Flute 6H With Chamfer - Ruko GmbH

Take advantage of the combination of HSS‑Co5 toughness, precise M20 x 2.5 threading and a straight‑flute geometry for consistent thread quality and reduced tool change frequency. Order the tool directly via Metav Werkzeuge or consult the specialists for application support.

RUKO machine tap DIN 376B — M20 x 2.5, HSS‑Co5, 6H tolerance

A machine tap designed for producing ISO metric threads in through‑hole applications, combining a high‑cobalt high‑speed steel grade with Form B straight flutes for demanding workshop and production use.

HSS‑Co5 high‑cobalt solid material
Straight‑flute design (Form B)
For steels up to 1000 N/mm² tensile
ISO metric M20 x 2.5, tolerance 6H

Increased throughput through robust high‑speed performance

The combination of HSS‑Co5 and a DIN‑compliant geometry supports higher sustained cutting loads and improved edge endurance. This material composition offers greater heat resistance and toughness compared with conventional high‑speed steels, enabling longer life in repetitive tapping cycles. The result is fewer tool changes and a measurable improvement in process uptime for small to medium series production, delivering a clear efficiency advantage in busy workshops and production cells.

Clean chip control and reliable thread form for through holes

The straight‑flute (Form B) geometry, combined with flank relief ground and a shear‑cut chamfer for through threads, produces predictable chip flow and stable cutting forces. This engineered geometry reduces the risk of tap breakage and helps to maintain a consistent thread profile, which is particularly beneficial when working with mixed batches of unalloyed or alloyed steels. The design concentrates on producing a repeatable, high‑quality thread with reduced secondary finishing.

Plug‑and‑go compatibility with standardised dimensions

Conforming to DIN 376B and DIN 13 Blatt 1, with an ISO2 (6H) tolerance class, the tool integrates seamlessly into standard tapping fixtures and CNC toolholders. The 16 mm shank allows secure clamping in power tool holders and collets, while the right‑hand cutting direction matches conventional spindle setups. The tap is specified for use in unalloyed and alloyed steels up to 1000 N/mm² tensile strength, malleable cast iron and non‑ferrous metals, offering flexible applicability across general engineering tasks.

Durable choice that reduces rework and downtime

By focusing on durable material and a conservative, serviceable geometry, the tool minimises the likelihood of thread failure during assembly. The combination of characteristics supports consistent first‑pass acceptance rates and lowers the need for rework. For production environments that prioritise repeatability and minimal stoppages, this tap represents a pragmatic balance between performance and long‑term reliability.

For application guidance, stock availability or to request a tailored supply proposal for the RUKO machine tap (SKU 4000601937NW), contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930 to receive prompt expert support and a detailed datasheet

Technical data

• Article number: 4000601937NW
• Label: Maschinengewindebohrer DIN 376B M20x2,5mm HSS‑Co5 6H RUKO
• Manufacturer: Ruko GmbH

Facts

• Thread: M20 x 2.5
• Tolerance: ISO2 (6H)
• Shank diameter: 16 mm
• Material grade: HSS‑Co5
• Applicable tensile strength: up to 1000 N/mm²
• Cutting direction: Right‑hand

Special features

• Form B straight‑flute design
• Flank relief ground
• DIN 13 Blatt 1 compliant
• Shear‑cut chamfer for through threads
• Suitable for unalloyed and alloyed steels, temper cast iron and non‑ferrous metals

FAQ

What materials is this tap suitable for?
The RUKO machine tap is designed for unalloyed and alloyed steels up to 1000 N/mm² tensile strength, temper cast iron and non‑ferrous metals, as specified in the product data.

Which tolerance and standard does the thread conform to?
Threads produced by this tap comply with DIN 13 Blatt 1 and the tolerance class ISO2 (6H) for metric threads.

What is the shank size and how is the tap clamped?
The tool has a 16 mm shank, suitable for standard collets and machine holders that accept a 16 mm clamping diameter.

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