M3 Countersink DIN 373 HSS 3-Flute, 180° Angle, For Steel And Cast Iron - TECWERK

Combine robust HSS construction, a 180° countersink angle and a fixed pilot pin for burr-free seating of fasteners; order this tool directly via Metav Werkzeuge or request application advice from our consultants.

TECWERK flat countersink DIN 373 M3 (HSS, 3 flutes)

A TECWERK flat countersink DIN 373 M3 engineered to create precise, burr-free countersinks for cylinder head screws, hex screws and nuts in steel and non‑ferrous materials

• HSS, DIN 373 standard compliance
• 180° countersink angle for flat seats
• Cylindrical shank with fixed pilot pin
• Three cutting edges for clean results

Precise seating for threaded assemblies

The design focuses on reliable, repeatable results when producing flat seats for fasteners. Made from HSS and complying with DIN 373, the tool provides a defined cutting geometry with a 180° countersink angle and three cutting edges, which together ensure concentric, flat seats for cylinder head and hex screws. These characteristics reduce the need for secondary finishing and support consistent assembly tolerances in production runs.

Clean machining and reduced rework

A combination of the fixed pilot pin and the cylindrical shank stabilises the tool during operation, allowing clean material removal and minimised chatter. The three‑edge geometry is optimised to deliver burr-free results across a range of materials, notably steel and cast iron as well as brass and light alloys. Best outcomes are achieved at low cutting speeds, where heat build‑up is limited and edge life is extended, reducing downtime for tool changes and rework.

Practical guidance and typical applications

Intended primarily for countersinking around a core or pilot hole, the cutter is suitable for producing accurate seats for fasteners and nuts in mechanical assemblies. The recommended feed in steel up to 500 N is 0.14 mm/rev, a practical starting point for achieving a consistent surface; adjust feed and speed according to material and machine rigidity. Conformity to DIN 373 signals compatibility with established workshop processes and makes integration into existing tool sets straightforward.

For burr‑free, precision countersinking with TECWERK quality, contact Metav Werkzeuge for availability and technical guidance at info@metav-werkzeuge.com or +49 2822 7131930

Technical Data

• Article number: 2000865345NW
• Designation: Flat countersink DIN 373 M3, HSS, 3 flutes
• Manufacturer: TECWERK
• Packaging unit: 1

Core specifications

• Countersink angle: 180°
• Cutting edges: 3
• Recommended feed in steel up to 500 N: 0.14 mm/rev
• Standard: DIN 373

Materials & special features

• Material: HSS
• Cylindrical shank and fixed pilot pin
• For producing countersinks for cylinder head screws, hex screws and nuts
• Ideal for burr‑free countersinking in steel, cast iron, brass and light metals
• Best results at low cutting speed
• Grade: for core hole

FAQ

What materials can this countersink machine?
The TECWERK flat countersink (SKU 2000865345NW) is designed for steel and cast iron and also performs well in non‑ferrous and light metals such as brass and aluminium.

What is the countersink angle and why does it matter?
The tool features a 180° countersink angle, which produces a flat seating surface suited to cylinder head screws and nuts, ensuring even load distribution in assemblies.

How many cutting edges does the cutter have and what is the benefit?
The cutter has three cutting edges, which balance cutting forces for a smoother finish and reduced chatter compared with two‑edge designs.

What shank and pilot arrangement does the tool use?
The tool is supplied with a cylindrical shank and a fixed pilot pin, providing stable guidance for concentric countersinking around a prepared core hole.

What feed rate is recommended for steel?
A recommended starting feed for steel up to 500 N is 0.14 mm/rev; actual settings should be adjusted to machine rigidity and workpiece conditions.

Manufacturer/Responsible: NORDWEST Handel AG, Robert‑Schuman‑Straße 17, 44263 Dortmund