150mm Countersink DIN 373 HSS 3-Flute 180° Pilot Shank For Steel And Cast Iron - TECWERK

Reliable burr‑free countersinking for steel, cast iron and non‑ferrous metals is achieved thanks to the combination of HSS construction and a 180° geometry that promotes flush seating. Fast, repeatable results are delivered by the cylindrical shank and fixed pilot pin — order directly via Metav Werkzeuge or contact our consultants for application guidance.

TECWERK Flat Countersink DIN 373 M12 — HSS, 3‑flute, 180°

The TECWERK Flat Countersink DIN 373 M12 is a DIN‑standard countersink with cylindrical shank and fixed pilot pin, designed for precise, burr‑free countersinking of cylinder head screws, hex bolts and nuts.

• DIN 373 standard design
• HSS construction for edge retention
• 180° angle for flush seating
• Cylindrical shank with fixed pilot pin

Precise, flush seating for threaded assemblies

The combination of 180° countersink geometry and high‑speed steel guarantees a flat, consistent seating surface for fasteners. Where correct clamping and torque are critical, this geometry reduces tilting and improves contact area, so assembly integrity is maintained. The tool’s specification follows DIN 373 and is intended to produce burr‑free chamfers even where close‑tolerance screw heads must sit flush.

Smooth cutting and controlled feed for reduced chatter

Equipped with three cutting edges, the countersink delivers balanced chip formation and reduced vibration during operation. For steel (up to the indicated 500 N condition) a recommended feed is 0.2 mm/rev, and best results are obtained at lower cutting speeds; this combination reduces chatter and minimises burr formation. The result is a cleaner secondary operation and less rework in production.

Repeatable alignment and straightforward mounting

A cylindrical shank with a fixed pilot pin ensures accurate guidance into the core hole, so each hole is centred reliably before countersinking. The tool is graded for use with a core hole and is suitable for preparing seats for cylinder head screws, hex head screws and nuts, which streamlines process planning and reduces cycle variability on repeat operations.

Durable performance across common workshop materials

Manufactured from HSS, the countersink is suitable for steel, cast iron, and a wide range of non‑ferrous and light metals. Its geometry and flute design are optimised for burr‑ and rattle‑free countersinking, so less finishing is required. In short runs and production batches alike, the tool offers dependable edge life and predictable results, supporting efficient throughput on the shop floor.

For burr‑free, DIN‑compliant countersinking choose the TECWERK Flat Countersink via Metav Werkzeuge — contact our Emmerich team at info@metav-werkzeuge.com or +49 2822 7131930 for tailored advice and supply coordination

Technical Data

• SKU: 2000865351NW
• Label: Flachsenker DIN 373 M12 f.Kernloch HSS Z.3 TECWERK
• Manufacturer: TECWERK
• Packaging unit: 1

Facts

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

Special features

• Material: HSS
• Cylindrical shank
• Fixed pilot pin
• For cylinder head screws, hex head screws and nuts
• Ideal for burr‑ and chatter‑free countersinking
• Suitable for steel, cast iron, non‑ferrous and light metals
• Best results at low cutting speeds
• Grade: for core hole

FAQ

Which materials can be processed with this countersink? The TECWERK flat countersink is suitable for steel, cast iron and non‑ferrous/light metals, delivering burr‑reduced results across these materials.

How many flutes does the tool have and why does that matter? The tool has three cutting edges, which promote balanced chip evacuation and reduced vibration compared with two‑flute designs.

What is the recommended feed and cutting speed? A feed of 0.2 mm/rev is indicated for steel within the specified condition (up to 500 N); lower cutting speeds are recommended for best surface finish and tool life.

Which fasteners is this countersink intended for? It is designed to produce seats for cylinder head screws, hex head screws and nuts, conforming to DIN 373 geometry for flush seating.

How does the shank and pilot pin affect repeatability? The cylindrical shank combined with the fixed pilot pin centres the tool in the core hole, ensuring repeatable alignment and consistent countersink depth

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