M20x2.5mm Machine Tap DIN 376C HSS Form C Right-Hand 35° Undercut Flanks ISO2 6H For Blind Holes - Ruko GmbH

Benefit from a robust combination of precision, efficient chip evacuation and broad material compatibility: the RUKO machine tap M20 x 2.5 mm, produced in HSS to DIN 376C, delivers consistent ISO threads with ISO2 (6H) tolerance for reliable assembly. Order directly via Metav Werkzeuge or consult the technical team for application-specific advice.

Machine tap DIN 376C M20 x 2.5 mm HSS 6H RUKO

The Machine tap DIN 376C M20 x 2.5 mm HSS 6H RUKO is a right-hand spiral machine tap designed for producing metric ISO threads in blind holes across a range of steels, cast iron and non‑ferrous metals.

HSS material for high wear resistance
35° right-hand helix for efficient chip evacuation
DIN 376C Form C for blind-hole threading
ISO2 (6H) tolerance for precise thread fits

Reliable ISO threads for production environments

The RUKO tap is built to deliver consistent thread geometry according to DIN 376C, producing M20 x 2.5 mm metric ISO threads with the ISO2 (6H) tolerance field. This standardised accuracy reduces assembly variation and supports predictable torque and fit behaviour in serial production. Where repeatability is required, the combination of the high‑speed steel specification and the tolerance class ensures parts mate correctly without costly rework.

Faster machining and safer blind‑hole tapping

Equipped with a 35° right‑hand helix, the tool promotes rapid chip evacuation even when working in blind holes, lowering the risk of chip packing and thread damage. The flanks are honed, which improves the start of the cut and reduces burr formation, leading to cleaner internal threads and less secondary finishing. These design choices translate into shorter cycle times and fewer scrap incidents on machining centres.

Broad material compatibility and machine integration

Manufactured from HSS, the tap copes with unalloyed and low‑alloy steels up to 800 N/mm², temper cast iron and a variety of non‑ferrous metals, making it suitable for mixed production runs. The shank diameter of 16 mm matches common machine holders, enabling secure clamping and stable cutting conditions. Right‑hand cutting direction permits straightforward integration with standard tapping spindles and automatic feed systems.

Dependable supply and pragmatic workshop advantages

The RUKO tool offers workshop resilience through durable cutting edges and a geometry optimised for industrial usage. Supplied as a single unit, it aligns with inventory strategies that favour targeted replenishment over bulk storage. Combined with Metav’s distribution and quality‑assurance approach, this tap supports steady production flow and reduces the procurement burden for precision tooling.

Request a technical consultation or application recommendation from Metav Werkzeuge to confirm compatibility with the machining centre and workpiece material; contact Metav Werkzeuge by e‑mail at info@metav-werkzeuge.com or by telephone on +49 2822 7131930

Technical data

• Article number: 4000601970NW
• Brand: RUKO
• Packaging unit: 1

Facts

• Thread: M20 x 2.5 mm
• Tolerance: ISO2 (6H)
• Material: HSS
• Shank diameter: 16 mm
• Helix angle: 35°
• Suitable tensile strength: up to 800 N/mm²

Special features

• DIN 376C (Form C)
• Right‑hand spiral (right‑hand cutting)
• Flanks honed
• Designed for blind holes
• Intended materials: unalloyed and low‑alloy steels, temper cast iron, non‑ferrous metals

FAQ

What materials can this tap machine for?
The RUKO machine tap M20 x 2.5 mm (SKU 4000601970NW) is suitable for unalloyed and low‑alloy steels up to 800 N/mm², temper cast iron and a range of non‑ferrous metals.

Is this tap suitable for blind holes or through holes?
This tool is manufactured to DIN 376C Form C, optimised specifically for producing threads in blind holes.

What tolerance and thread standard does the tap produce?
The tap cuts metric ISO threads M20 x 2.5 mm with an ISO2 (6H) tolerance field, compatible with standardised mating parts.

How does the helix angle affect machining performance?
The 35° right‑hand helix improves chip evacuation in confined spaces, reducing the chance of chip clogging and improving surface quality in internal threads.

Which shank size is required for machine mounting?
The tool features a 16 mm shank diameter, suitable for common machine holders and tapping spindles to ensure stable clamping.

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