Maykestag HSS-Co5 Spiral Fluted Machine Tap M12 x 1.75
Professional M12 x 1.75 spiral-fluted machine tap manufactured from HSS-Co5 for producing metric ISO internal threads in blind holes. The 40° spiral flute geometry, Form C chamfer and ISO 2 (6H) tolerance provide a controlled, accurate threading solution for workshop and production machining.
The Maykestag Code 4805 machine tap is designed for machining metric ISO threads according to DIN 13. This M12 version has a standard 1.75mm pitch and is manufactured to DIN 376 dimensions, with HSS-Co5 cutting material for the toughness and heat resistance required in professional machine tapping applications.
Its 40° spiral-fluted geometry is specifically suited to blind-hole threading. The helical flutes help transport chips back towards the entrance of the hole during cutting, reducing chip accumulation at the bottom of the hole and supporting a cleaner, more controlled tapping process. A Form C chamfer of 2–3 pitches provides a relatively short lead suitable for producing threads where available hole depth is limited.
Product highlights
- M12 x 1.75 metric thread: Produces standard M12 coarse-pitch metric ISO internal threads according to DIN 13.
- HSS-Co5 construction: Cobalt-alloyed high-speed steel provides a strong combination of toughness, hot hardness and cutting-edge durability.
- 40° spiral flutes: Helical flute geometry assists with chip evacuation towards the entrance of the blind hole.
- Blind-hole design: Particularly suited to applications where chips cannot be pushed through the opposite side of the workpiece.
- Form C chamfer: Short 2–3 pitch lead provides controlled thread entry while allowing useful thread depth in blind holes.
- ISO 2 (6H) tolerance: Produces the widely used 6H tolerance class for metric internal threads.
- DIN 376: Manufactured to the applicable dimensional standard for this M12 tap size.
- Green ring Uni classification: Identifies the Maykestag universal application range for versatile machining across a broad selection of suitable materials.
Why Choose Maykestag?
Maykestag develops precision cutting tools for professional machining applications, with clearly defined tool geometry, tolerances and material suitability data. With threading tools, this consistency is especially important because tap geometry, cutting material and correct preparation of the tapping hole all contribute directly to thread accuracy, cutting reliability and tool life.
The Code 4805 range combines HSS-Co5 tool material with a 40° spiral flute, Form C chamfer and 6H thread tolerance. The result is a specialised blind-hole machine tap designed to produce clean, repeatable metric threads when used with the correct cutting conditions and tapping-hole diameter.
Designed for Reliable Blind-Hole Threading
Blind-hole tapping requires effective chip control because there is no open exit below the thread. The Code 4805 tap addresses this with its 40° spiral flute geometry, which assists in directing chips back along the flutes towards the hole entrance. For this M12 x 1.75 version, Maykestag specifies a 10.2mm tapping drill diameter. Correct hole preparation, suitable lubrication and the appropriate cutting speed are important for reducing tapping torque and achieving accurate thread form.
