150mm Countersink Set DIN 373 HSS 3-Flute Spiral With Pilot And Cylindrical Shank, 6-Piece - Ruko GmbH

Take advantage of durable HSS construction, the 3‑cutting‑edge spiral geometry and the built‑in pilot pin for reliable centring; order directly via Metav Werkzeuge or request application advice from our consultants.

Ruko countersink set DIN 373 M3–M10 – HSS, spiral‑fluted with fixed pilot pin

The Ruko countersink set DIN 373 M3–M10 is a purpose‑made selection for precise preparation of threaded holes, covering the common metric thread sizes from M3 to M10.

• HSS construction for durable cutting
• Spiral‑fluted, 3‑cutting‑edge geometry
• Fixed pilot pin for accurate centring
• Supplied in a compact plastic cassette

Faster, cleaner thread preparation

The set is manufactured from HSS, meeting the DIN 373 specification and optimised for steady material removal and long tool life. The 3‑flute design reduces vibration and produces a uniform chamfer, which improves seating for fasteners and reduces rework. Where throughput matters, the combination of spiral fluting and three cutting edges enables consistent chip evacuation and a cleaner finish, translating into fewer rejects and less manual deburring on the production line.

Reliable centring and compatibility with standard chucks

A fixed pilot pin ensures secure centring when preparing tapped holes, minimising axial run‑out and the risk of off‑centre countersinks. The tools are fitted with a cylindrical shank, compatible with conventional drill chucks and holders, which simplifies integration into existing workstations and drilling rigs. Covering the M3–M10 thread range, this set provides a practical spread of sizes for general workshop and maintenance tasks without the need for frequent tool changes.

Organised storage and workshop readiness

Each cutter is supplied in a durable plastic cassette, keeping cutters secure and organised at the bench or in the tool cupboard. The compact storage reduces search time and protects cutting edges during transport, supporting smooth workshop routines and faster job turnover. The set includes one countersink for each specified thread size, offering a ready‑to‑use assortment that reduces procurement complexity and keeps downtime to a minimum.

Contact Metav Werkzeuge for tailored application advice on the Ruko countersink set and to arrange supply from Emmerich; email info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: 4000601844NW
• Item name: Countersink set DIN 373 M3–M10
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Core data

• Cutting edges: 3
• Thread range: M3–M10
• Content: 6 pieces
• Standard: DIN 373

Special features

• Material: HSS
• Spiral‑fluted
• Fixed pilot pin
• Cylindrical shank
• Supplied in plastic cassette

FAQ

Which thread sizes does the set cover?
The Ruko countersink set covers thread sizes from M3 to M10 and includes one countersink for each size in the specified range (SKU 4000601844NW).

What is the advantage of the 3‑flute geometry?
The 3‑flute, spiral‑fluted geometry in this Ruko countersink set reduces vibration, improves chip evacuation and produces a cleaner chamfer for reliable screw seating.

Is the pilot pin suitable for centring on drilled holes?
Yes, the fixed pilot pin provides stable centring for accurate chamfering and helps to prevent walk during preparation of threaded holes with the Ruko countersink set.

What type of shank do the cutters have?
The cutters are fitted with a cylindrical shank, allowing use in standard drill chucks and common tool holders suitable for workshop and maintenance tasks.

How are the tools supplied and stored?
The Ruko set is supplied in a compact plastic cassette that protects the cutting edges and keeps the assortment organised for rapid workshop access.

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