M5x0.8mm Machine Tap HSS-Co5 Form C Right-Hand 35° Flank Relief 6H Blind Hole Shank 6mm - Ruko GmbH

Achieve reliable metric threads with a combination of HSS‑Co5 wear resistance and a 35° right‑hand spiral that optimises chip control; order the machine tap directly via Metav Werkzeuge or ask our consultants for technical guidance.

Machine tap DIN 371C M5×0.8 HSS‑Co5 6H – RUKO

The machine tap DIN 371C M5×0.8 HSS‑Co5 6H RUKO is a production‑grade tool for cutting metric ISO blind threads in steels, malleable cast iron and non‑ferrous metals, optimised for consistent fits in small‑diameter components.

*HSS‑Co5 for superior heat resistance
*Right‑hand 35° spiral for blind holes
*Tolerance ISO2 (6H) for precise thread fit
*Suitable for steels up to 1000 N/mm²

Engineered precision for repeatable threadmaking

The RUKO tap is made from HSS‑Co5, a high‑speed steel alloyed with cobalt that supports higher thermal loads and extends tool life under production conditions. The M5×0.8 metric profile is manufactured to DIN 13 (sheet 1) standards and the ISO2 (6H) tolerance ensures a reproducible clearance fit. These specifications translate into fewer rejected parts and predictable assembly behaviour, which supports process stability on the shop floor.

Designed for efficient blind‑hole threading

A right‑hand 35° spiral directs chips back up the flutes, reducing chip packing when producing blind‑hole threads. The spiral geometry combined with flanks that are relief ground reduces cutting forces and lowers the risk of tap breakage in confined holes. For operations that require consistent thread quality in pockets or cavities, this geometry gives a measurable increase in first‑pass yield and reduces the need for time‑consuming chip removal steps.

Material compatibility that supports workshop versatility

This tool is specified for unalloyed and alloyed steels up to 1000 N/mm², as well as malleable cast iron and non‑ferrous metals, offering broad applicability across maintenance, prototyping and small‑series production. The material rating allows engineers to standardise on a single tapping solution for multiple components, simplifying inventory and reducing setup variability while maintaining cutting performance across different substrates.

Geometry and tolerancing that lower rework rates

The tap’s Form C design and ISO2 (6H) tolerance class deliver a close‑controlled thread form that minimises post‑process fitting or rework. Relief‑ground flanks optimise chip breakage and reduce friction during cutting, while the straight shank with Ø 6 mm provides stable clamping in common tap holders. Together, these features reduce process disruptions and support higher throughput with consistent thread accuracy.

Contact Metav Werkzeuge for expert advice or to request the RUKO machine tap (SKU 4000601995NW) for timely supply from Emmerich; eMail: info@metav-werkzeuge.com | Tel: +49 2822 7131930

Technical data

• Article number: 4000601995NW
• Description: Machine tap DIN 371C M5×0.8 HSS‑Co5 6H RUKO
• Brand: Ruko GmbH
• Pack unit: 1

Facts

• Thread: M5 × 0.8
• Tolerance class: ISO2 (6H)
• Spiral angle: 35°
• Shank diameter: 6 mm
• Material strength rating: up to 1000 N/mm²

Special features

• HSS‑Co5 material
• Form C geometry
• Right‑hand spiral 35°
• Relief ground flanks
• Metric ISO thread to DIN 13 sheet 1
• Intended for blind‑hole threads
• Suitable for unalloyed and alloyed steels, malleable cast iron, non‑ferrous metals
• Cutting direction: right‑hand

FAQ

Which materials can be threaded with this tap?
The RUKO machine tap (M5×0.8) is suitable for unalloyed and alloyed steels up to 1000 N/mm², malleable cast iron and non‑ferrous metals, providing flexibility for workshop and light production use.

Is this tap suitable for blind holes?
Yes, the right‑hand 35° spiral is designed to evacuate chips efficiently during blind‑hole tapping, reducing chip packing and the risk of thread damage.

What thread tolerance does the tool deliver?
Threads are produced to ISO2 (6H) tolerance, matching metric ISO requirements and DIN 13 (sheet 1) for consistent fits and interchangeability.

What is the shank diameter and how is it clamped?
Shank Ø is 6 mm; the straight shank size suits standard collets and tap holders designed for small‑diameter machine tapping.

Can this product be used in serial production?
The HSS‑Co5 composition, robust geometry and form C design make the tap suitable for serial production tasks where repeatability and tool life are required; refer to SKU 4000601995NW for ordering.

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