M6 Countersink DIN 373 HSS 3-Flute 180° With Pilot, For Steel Cast Iron Aluminium - TECWERK

Take advantage of the combination of robust HSS construction, a precise 180° countersink angle and three cutting edges for burr-free seating in steel and cast iron; order directly via Metav Werkzeuge or consult the specialists for application advice.

TECWERK Flat Countersink DIN 373 M6 – HSS, 180° countersink

TECWERK Flat Countersink DIN 373 M6 is a precision countersink with cylindrical shank and fixed pilot pin, designed for clean chamfers for cylinder head screws, hexagon screws and nuts in steel, cast iron and non-ferrous metals

• HSS construction for long tool life
• DIN 373 standard compatibility
• 180° countersink angle for flush seating
• Three cutting edges for smooth finish

Precise, burr-free chamfers for secure fastenings

The HSS tool geometry and three cutting edges ensure consistent chip formation and a clean edge, producing burr-free countersinks that improve the seating of fasteners and reduce rework. The tool is intended for use after a pilot drill has produced the core hole; the specified quality grade for pilot holes guarantees accurate guidance. The result is repeatable seating depth and improved joint integrity, particularly where flush mounting is critical in assemblies.

Reliable alignment and repeatable process security

Equipped with a cylindrical shank and a fixed pilot pin, the design follows DIN 373, offering reliable alignment when countersinking for cylinder head and hexagon screws and nuts. This mechanical guidance reduces radial runout and vibration, which in turn lowers the risk of chatter marks and surface defects. The standardised form factor simplifies machine setup and replacement, delivering predictable results across batches without complex adjustment.

Productive machining with clear operating parameters

Best results are achieved at a low cutting speed, with an indicated feed of 0.2 mm/rev in steels up to 500 N, which balances tool life and surface quality. The countersink performs well on steel, cast iron and non-ferrous/light metals, producing smooth chamfers while limiting heat build-up thanks to the HSS substrate. Fewer passes and reduced deburring translate into shorter cycle times and lower downstream labour, making this countersink suitable for both workshop maintenance and small-series production.

For a reliable countersinking solution with proven performance, contact Metav Werkzeuge to order the TECWERK Flat Countersink DIN 373 M6 (SKU 2000865348NW) or to receive tailored machining advice via info@metav-werkzeuge.com or +49 2822 7131930.

Technical data

• Article number: 2000865348NW
• Designation: Flat countersink DIN 373 M6
• Brand: TECWERK
• Packaging unit: 1
• UID: 2000865348NW

Core data

• Countersink angle: 180°
• Number of cutting edges: 3
• Feed in steel up to 500 N: 0.2 mm/rev
• Shank: cylindrical with fixed pilot pin

Materials & applications

• Material: HSS
• Applications: countersinking for cylinder head screws, hexagon screws and nuts
• Suitable for: steel, cast iron, non-ferrous and light metals
• Recommended: low cutting speed for best results

FAQ

What pilot hole is required for correct use? The countersink is intended for use after a matching pilot hole; follow the specified quality grade for the pilot hole to ensure the TECWERK Flat Countersink DIN 373 M6 runs true and produces clean chamfers.

Which materials can be machined with this countersink? This HSS countersink performs well on steel, cast iron and non-ferrous/light metals, giving the best results at lower cutting speeds.

What feed and cutting conditions are recommended for steels? For steels up to 500 N, a feed of 0.2 mm/rev is indicated; a reduced cutting speed helps preserve tool life and surface finish when countersinking.

Is this tool compliant with recognised standards? Yes, the design conforms to DIN 373, providing a standardised geometry for consistent seating of cylinder head and hexagon screws as well as nuts.

How does the pilot pin improve results? The fixed pilot pin centres the countersink in the pilot hole, reducing runout and vibration and therefore improving surface quality and repeatability during production.

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