M8 Countersink DIN 373 HSS 3-Flute 180° For Steel And Cast Iron, Medium Grade - TECWERK

Combining HSS cutting geometry, a 180° countersink angle and a secure cylindrical shank with fixed pilot pin, this tool delivers burr-free chamfers in steel, cast iron and non-ferrous metals while favouring low cutting speeds for best surface quality. Order the flat countersink directly via Metav Werkzeuge or request advice from our consultants.

Flat countersink DIN 373 M8 (HSS, 180°, 3-flute) – TECWERK

The Flat countersink DIN 373 M8 is a high-speed steel countersink designed for precise, burr-free chamfering of cylinder head screws, hex bolts and nuts in steels and light metals

• High-speed steel, three cutting edges
• 180° countersink angle for cylinder heads
• Cylindrical shank with fixed pilot pin
• Medium grade for through-hole applications

Reliable geometry for consistent, burr-free chamfers

The tool’s three cutting edges and optimised flute geometry deliver uniform chip removal, which results in a burr-free finish even in mixed-material production runs. Made from HSS, the cutter provides toughness and wear resistance that support stable operation in standard workshop conditions. The tool’s geometry is specified to DIN 373, ensuring compatibility with established countersinking practices and simplifying process planning in maintenance and small-batch manufacturing.

Precise application range and machining guidance

With a 180° countersink angle and an M8 nominal size, the cutter is intended for chamfers to accept cylinder head screws, hex screws and nuts; the fixed pilot pin and cylindrical shank guarantee concentric guidance through a through-hole. For steel up to the indicated strength, the recommended feed is 0.2 mm per revolution, and best results are achieved at lower cutting speeds, which reduces heat and promotes a clean edge without smearing or roll-over on softer metals.

Operational advantages for workshop and production

The medium-grade specification makes this countersink suitable for through-hole operations where a balance of tool life and cutting performance is required. The combination of HSS material and robust shank design reduces the frequency of rework and tool changes, supporting smoother production flow and predictable cycle times. When used in the recommended speed and feed window, the cutter lowers the risk of chatter and produces a consistent seating surface for fasteners.

Practical considerations and compatibility

This countersink excels in applications across steel, cast iron and a range of non-ferrous and light metals, including aluminium alloys, delivering clear advantages for workshop repair, component finishing and assembly preparation. The tool’s fixed pilot pin simplifies setup for through-holes, and conformity to DIN 373 facilitates integration with existing jigs and fixtures. For operations requiring higher cutting speeds or specialised coatings, consider matching tool grades and machining parameters to the component material.

For specialist advice on application or to secure supply of TECWERK countersinks, contact Metav Werkzeuge by email at info@metav-werkzeuge.com or by phone on +49 2822 7131930 — our specialists in Emmerich will advise on suitability and delivery

Technical Data

• Article number: 2000865342NW
• Label: Flachsenker DIN 373 M8 Güte mittel f.DL HSS Z.3 TECWERK
• Packaging unit: 1
• Brand: TECWERK

Core specifications

• Cutting edges: 3
• Countersink angle: 180°
• Feed in steel up to 500 N: 0.2 mm/rev
• Size designation: M8
• Grade: medium

Materials & applications

• Material: HSS
• Cylindrical shank with fixed pilot pin
• For steel, cast iron, non-ferrous and light metals
• Best results at low cutting speeds
• Conforms to DIN 373
• For countersinking cylinder head screws, hex bolts and nuts
• Medium grade for through-hole applications

FAQ

What materials can this countersink machine?
The TECWERK flat countersink is suitable for steel, cast iron and a variety of non‑ferrous and light metals; its HSS construction supports general-purpose workshop use.

Is the tool suitable for through-hole countersinking of M8 fasteners?
Yes, the tool is specified for M8 through-hole applications and features a fixed pilot pin and cylindrical shank for concentric guidance.

What cutting data is recommended for steel?
For steel up to the indicated strength, the tool’s guidance specifies a feed of 0.2 mm per revolution and best surface quality at lower cutting speeds.

How does the DIN 373 designation affect compatibility?
DIN 373 conformity means the countersink’s geometry follows standardised dimensions and angles, facilitating integration with existing jigs, fixtures and process parameters.

How many cutting edges does the cutter have and why does this matter?
The cutter has three cutting edges, which promotes balanced chip removal and a smooth, burr‑reduced chamfer suitable for assembly seating.

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