M5 Countersink DIN 373 HSS 3-Flute With Pilot Pin, 180° Countersink Angle - TECWERK

Combining durable HSS construction, a 180° countersink angle and three cutting edges, this countersink ensures burr-free and chatter-free seating for cylinder head and hexagon fasteners; order directly via Metav Werkzeuge or consult the Metav advisors for technical guidance.

TECWERK Flat Countersink DIN 373 M5 — HSS, 180° countersink for core holes

TECWERK Flat Countersink DIN 373 M5 designed for precise, burr-free countersinking of cylinder head screws, hexagon screws and nuts in steel, cast and non-ferrous materials

• HSS grade for high wear resistance
• 180° countersink angle for flush seating
• Three cutting edges for smooth, burr-free finish
• Cylindrical shank with fixed pilot pin for accurate centring

High-precision countersinking for reliable assemblies

The tool is manufactured to the DIN 373 standard in HSS, giving a robust cutting geometry that delivers reproducible results in demanding workshop and production settings. The 180° seating angle produces a true, flush fit for cylinder head and hexagon fasteners, reducing the need for post-process rework. With three cutting edges, the tool spreads cutting forces evenly to produce a burr-free finish, which shortens assembly time and improves joint quality — a direct gain in process reliability and first-pass yield.

Consistent cutting performance with defined feeds

Designed to perform best at low cutting speed, the countersink achieves superior surface quality when paired with conservative spindle speeds. The specified feed of 0.16 mm/rev in steel (up to 500 N) gives a clear operational target: keep the feed within this range to maintain edge life and avoid chatter. The cylindrical shank ensures stable clamping in standard chucks, while the fixed pilot pin centres the tool in the pre-drilled core hole to prevent wandering — a combination that supports repeatable hole geometry and reduces scrap rates.

Broad material range and workshop advantages

Suitable for machining steel, cast iron and non-ferrous metals, the countersink delivers reliable deburring and clean chamfers across common production materials. Its designation for use with a core hole means the geometry is matched to typical pre-drilled conditions, saving set-up time. For fabricators and maintenance teams, the tool provides a compact, durable solution that replaces multiple makeshift countersinking attempts — a practical means to improve throughput and maintain a consistent surface quality in assembly applications.

For procurement or technical advice on TECWERK flat countersinks, contact Metav Werkzeuge in Emmerich for rapid supply and expert recommendations at info@metav-werkzeuge.com or +49 2822 7131930

Technical Data

• Article number: 2000865347NW
• Item label: Flachsenker DIN 373 M5 f.Kernloch HSS Z.3 TECWERK
• Manufacturer: TECWERK
• Packaging unit: 1

Facts

• Material: HSS
• Countersink angle: 180°
• Number of cutting edges: 3
• Feed in steel (≤ 500 N): 0.16 mm/rev

Special features

• DIN 373 compliant
• Cylindrical shank with fixed pilot pin
• For cylinder head screws, hexagon screws and nuts
• Ideal for burr- and chatter-free countersinking
• Best results at low cutting speed

FAQ

Which materials can be machined with this countersink?
The TECWERK flat countersink is suitable for steel, cast iron and non‑ferrous metals, offering burr‑free finishing across these common materials.

What spindle speed is recommended for best results?
Best results are achieved at low cutting speeds; combine conservative spindle speeds with the specified feed of 0.16 mm/rev in steel to preserve edge life and avoid chatter.

How does the fixed pilot pin affect performance?
The fixed pilot pin centres the countersink in a pre‑drilled core hole, preventing wandering and ensuring consistent chamfer geometry with each pass.

Is the tool compatible with standard drill chucks?
Yes — the cylindrical shank is designed for secure clamping in standard chucks, enabling quick tool changes and stable operation.

What applications is this countersink intended for?
It is intended for producing seating surfaces for cylinder head screws, hexagon screws and nuts, particularly where a burr‑free finish and accurate seating are required; SKU 2000865347NW identifies this TECWERK model.

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