150mm Countersink DIN 373 3-Flute HSS, 180° Angle, Fine Grade - TECWERK

Take advantage of the combination of HSS cutting geometry, a 180° countersink angle and a fixed pilot pin for reliable, burr-free seating of socket and hex screws; order the tool directly via Metav Werkzeuge or consult the Metav team for application advice.

Flat countersink DIN 373 M8, fine grade for through-hole, HSS, 3-flute – TECWERK

The Flat countersink DIN 373 M8, fine grade for through-hole, HSS, 3-flute – TECWERK is a precision countersinking tool for creating clean, flush recesses for socket-head cap screws, hex bolts and nuts in a range of common workshop materials

• HSS with 180° countersink angle
• Three cutting edges for smooth finish
• Cylindrical shank with fixed pilot pin
• Fine grade optimised for through-holes

Burr-free seating for threaded fasteners

The 180° geometry and fine-grade flute design deliver burr-free countersinks suitable for socket-head cap screws, hex bolts and nuts. This tool produces a clean bearing surface that supports correct torque transfer and reduces post-process rework. It is engineered for use in steel, cast iron and non-ferrous metals, where a precise, flat seating is required; the geometry prevents undercutting and ensures the fastener head sits uniformly, improving assembly quality and component longevity.

Reliable cutting performance and optimised feeds

Made from HSS and equipped with three cutting edges, the tool offers consistent material removal and a superior surface finish compared with two-flute alternatives. For workpieces up to the specified resistance, a recommended feed of 0.2 mm/rev in steel (up to 500 N) balances chip formation and surface integrity. The design achieves the best results at lower cutting speeds, which reduces heat input and preserves edge life while maintaining a controlled, chatter-free operation—important for repeatable production runs.

Accurate guidance and reduced vibration for consistent results

A cylindrical shank combined with a fixed pilot pin provides positive centring, particularly for through-hole countersinking. The pilot maintains alignment during entry, which helps to avoid slippage and chatter, producing a predictable seat every cycle. The fine quality grade designed for through-holes further improves repeatability in batch work, so the tool is suitable for both single-item workshops and serial production where consistent fastener seating is critical.

Practical suitability for workshop and production environments

The construction and recommended cutting parameters make this countersink a straightforward choice for maintenance, toolrooms and fabrication shops that demand reliable, burr-free countersinking without complex process setup. The tool reduces secondary deburring operations and supports faster assembly checks, contributing to shorter cycle times and less scrap. For complex materials or unfamiliar applications, technical advice is available to confirm suitability and recommended speeds.

For guaranteed precision and dependable supply, request the TECWERK flat countersink via Metav Werkzeuge — contact Metav Werkzeuge in Emmerich at info@metav-werkzeuge.com or +49 2822 7131930 for technical guidance and timely delivery

Technical Data

• Article number: 2000865335NW
• SKU / UID: 2000865335NW
• Manufacturer: TECWERK
• Packaging unit: 1

Core data

• Countersink angle: 180°
• Cutting edges: 3
• Recommended feed in steel (≤ 500 N): 0.2 mm/rev
• Material: HSS
• Grade: fine for through-hole

Special features

• Cylindrical shank
• Fixed pilot pin
• Designed for socket-head screws, hex bolts and nuts
• Ideal for burr- and chatter-free countersinking in steel and cast iron, non-ferrous and light metals
• Best results at low cutting speed

FAQ

What materials is this countersink suitable for?
The TECWERK flat countersink is suitable for steel, cast iron and non-ferrous or light metals, offering burr-free results across these material groups.

How many cutting edges does the tool have and why does it matter?
The tool features three cutting edges, which improve finish quality and balance cutting forces for smoother, chatter-reduced operation compared with two-flute designs.

What is the countersink angle and which fasteners does it accommodate?
The countersink has a 180° angle and is intended for producing recesses for socket-head cap screws, hex bolts and nuts.

Is a pilot pin included and what is its function?
A fixed pilot pin is integrated to ensure accurate centring and to reduce slippage during entry, helping to achieve consistent seating in through-holes.

Is there a recommended cutting speed or feed?
Best results are achieved at lower cutting speeds with the recommended feed in steel up to 500 N of 0.2 mm/rev to maintain surface quality and tool life.

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