150mm Countersink DIN 373 HSS 3-Flute Fine Grade 180° For Through Holes, Steel & Cast - TECWERK

Benefit from precise, burr‑free countersinking achieved by the combination of HSS construction and a 3‑flute geometry with a fixed pilot; the fine grade tolerance and 180° angle ensure consistent seating for cylinder‑head and hex screws. Order the TECWERK flat countersink directly via Metav Werkzeuge or consult our specialists for application advice.

Flat countersink DIN 373 M6 – TECWERK (fine grade, HSS, 3 flutes, 180°)

A Flat countersink DIN 373 M6 engineered for burr‑free creation of countersinks for cylinder‑head screws, hex screws and nuts across steel, cast and non‑ferrous materials.

• HSS with 3 cutting edges
• 180° countersinking angle
• Cylindrical shank with fixed pilot
• Fine grade for through‑holes

Reliable seating and assembly quality

The 180° countersink geometry delivers a precise contact surface that improves fastening reliability. With a 3‑flute design in HSS, the tool produces a consistent chamfer and reduces radial forces, which translates to fewer distorted screw heads and more uniform torque behaviour during assembly. This results in fewer reworks and more predictable joint performance, particularly important in serial production and maintenance workflows.

Clean finishes and vibration control

The combination of a fixed pilot and balanced flute geometry minimises chatter and burr formation during countersinking. Such stability yields noticeably burr‑free edges on both through‑holes and mating surfaces, reducing the need for secondary deburring operations. For workshops focused on finish quality, this tool reduces manual rework time and improves the first‑pass yield for assemblies.

Optimised cutting parameters for durable results

Rated to perform best at low cutting speed, the tool achieves superior surface quality in tougher materials. The specification includes a feed recommendation of 0.2 mm/rev in steel up to 500 N, which provides a practical starting point for process setup and ensures consistent material removal without overheating. Compliance with DIN 373 gives a clear reference for tolerances and interchangeability in professional environments.

Versatile material applications and workshop fit

Designed for use in steel, cast iron and non‑ferrous and light metals, the countersink covers a broad range of common workshop tasks. The cylindrical shank makes the tool compatible with standard tooling holders and drill chucks, while the fine grade is optimised for through‑hole applications where tight countersink tolerances are required. Integration into existing workflows is straightforward, supporting both manual and machine production settings.

For reliable, repeatable countersinking choose the TECWERK fine‑grade flat countersink via Metav Werkzeuge — contact our Emmerich team for specification guidance or application recommendations.

Technical data

• Article number: 2000865334NW
• Label: Flachsenker DIN 373 M6 Güte fein f.DL HSS Z.3 TECWERK
• Manufacturer: TECWERK
• Packaging unit: 1

Facts

• Countersink angle: 180°
• Cutting edges: 3
• Feed in steel ≤ 500 N: 0.2 mm/rev
• Standard: DIN 373

Special features

• Material: HSS
• Shank: cylindrical shank with fixed pilot
• Grade: fine for through‑holes
• Application: steel, cast iron, non‑ferrous and light metals
• Recommendation: best results at low cutting speed

FAQ

What screw types is this countersink suitable for?
The countersink is suitable for creating recesses for cylinder‑head screws, hex screws and nuts as described for the TECWERK flat countersink (DIN 373 M6).

Can the tool be used on stainless or hardened steel?
The design is optimised for steel and cast iron plus non‑ferrous metals; for stainless or hardened steels, process parameters should be adapted and tool life monitored.

How should feed and speed be set for reliable results?
A feed of 0.2 mm/rev in steel up to 500 N and a low cutting speed are recommended to achieve the best surface finish and long tool life with this countersink.

Is the shank compatible with standard drill chucks?
Yes, the cylindrical shank fits standard chucks and holders, making the tool straightforward to integrate into typical workshop equipment.

What quality standard does the tool conform to?
The countersink is produced to DIN 373 specifications, ensuring standardised geometry and interchangeability for professional applications.

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