M4 x 0.7mm Machine Tap HSS-Co5 Form C 6H Right-Hand 35° - Ruko GmbH

Take advantage of the combination of HSS‑Co5 wear resistance, ISO2 (6H) thread accuracy and a right‑hand 35° spiral for dependable blind‑hole tapping; order the Machine Tap DIN 371C M4 x 0.7 HSS‑Co5 directly via Metav Werkzeuge or ask our consultants if needed.

Machine Tap DIN 371C M4 x 0.7 HSS‑Co5 (RUKO) — spiral form C tap for blind holes, ISO2 (6H) metric thread

Machine Tap DIN 371C M4 x 0.7 HSS‑Co5 is a spiral‑fluted, form C machine tap designed for efficient creation of M4 x 0.7 metric ISO threads in blind holes, suitable for a range of steels and non‑ferrous metals

• HSS‑Co5 high‑speed steel with 5% cobalt
• Form C spiral tap, right‑hand spiral 35°
• For blind holes, metric ISO thread M4 x 0.7
• ISO2 tolerance (6H) for precise mating

Durable alloyed steel for longer tool life and consistent thread quality

The combination of HSS‑Co5 (high‑speed steel with 5% cobalt) and honed flanks gives the tap extended edge stability and resistance to heat‑related wear. This material choice reduces flank wear when cutting into unalloyed and alloyed steels up to 1000 N/mm² tensile strength and also performs well in malleable cast iron and various non‑ferrous metals. The net result is fewer tool changes and a lower risk of thread rework, supporting continuous production in busy workshops and small‑batch industrial runs.

Geometry optimised for blind‑hole tapping and reliable chip control

The form C geometry with a right‑hand spiral of 35° is tailored to evacuate chips back into the flute when tapping blind holes, decreasing the likelihood of chip build‑up at the hole bottom. Combined with ISO2 (6H) tolerance and the DIN 13 Blatt 1 thread form, this design ensures repeatable, accurate M4 x 0.7 threads that fit mating parts without excessive play. The honed flank edges improve surface finish and reduce the cutting forces required, which benefits machine tool spindle life and workpiece integrity.

Practical performance and application guidance for production use

Shaft diameter and cutting direction are configured for secure clamping and standard machine tapping operations; the specified 4.5 mm shank and right‑hand cutting orientation match common tool holders and collets. For best results, use appropriate cutting fluid and match spindle speeds to the material being machined; this preserves the tap’s cutting geometry and enhances lifetime. Supplied as a single unit, the tool is intended for professional use in machine shops and maintenance departments where reliable, metric thread production is essential.

For tailored machining advice or to procure the RUKO Machine Tap DIN 371C M4 x 0.7 HSS‑Co5, contact Metav Werkzeuge GmbH in Emmerich by e‑mail at info@metav-werkzeuge.com or by phone at +49 2822 7131930 — Metav’s experts are available to assist with selection and application details

Technical data

• Article number: 4000601994NW
• Item: Machine Tap DIN 371C M4 x 0.7 HSS‑Co5 6H RUKO
• Manufacturer: Ruko GmbH Präzisionswerkzeuge
• Packaging unit: 1
• UID: 4000601994NW

Core technical figures

• Thread: M4 x 0.7
• Tolerance: ISO2 (6H)
• Shank diameter: 4.5 mm
• Spiral angle: 35° (right‑hand)
• Recommended material strength: up to 1000 N/mm² tensile strength

Special features and materials

• Material: HSS‑Co5 (high‑speed steel with 5% cobalt)
• Form: DIN 371C (form C) spiral tap
• Application: for blind holes
• Flanks: honed (flank regrind)
• Thread standard: metric ISO, DIN 13 Blatt 1
• Cutting direction: right‑hand cutting

FAQ

What materials can this tap machine reliably cut?
The RUKO machine tap is made from HSS‑Co5 and is suitable for unalloyed and alloyed steels up to 1000 N/mm², temper cast iron and various non‑ferrous metals.

Is this tap suitable for blind‑hole applications?
Yes, the DIN 371C form C geometry with a 35° right‑hand spiral is specifically designed to evacuate chips when producing blind holes.

What thread tolerance does the tool produce?
This tap produces metric ISO threads to ISO2 (6H) tolerance, delivering accurate fits for standard M4 x 0.7 threaded assemblies.

Can the tap be used in automatic tapping machines?
The tool’s shank diameter of 4.5 mm and right‑hand cutting direction make it compatible with standard machine tapping setups; check machine collet compatibility before use.

Which standard defines the thread form?
The thread form follows DIN 13 Blatt 1, ensuring conformity with common metric ISO thread profiles.

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