Maykestag HSS-Co5 Machine Tap MF 20 x 1.5 DIN 374 Form B
Professional HSS-Co5 machine tap for producing MF 20 x 1.5 metric fine internal threads in through holes, manufactured to DIN 374 with an ISO2 (6H) thread tolerance and Form B 3.5–5P chamfer for controlled, accurate thread cutting.
The Maykestag Code 5154 machine tap is designed for accurate production of metric fine threads in professional machining applications. This MF 20 tap has a 1.5mm pitch and is manufactured from HSS-Co5 cobalt-alloyed high-speed steel, providing the toughness, heat resistance and cutting-edge durability required for dependable thread production. Its Form B chamfer provides a progressive cutting lead over approximately 3.5 to 5 thread pitches, making the geometry particularly suitable for through-hole tapping.
Product highlights
- MF 20 x 1.5 thread: Produces a 20mm nominal metric fine internal thread with a precise 1.5mm pitch.
- HSS-Co5 construction: Cobalt-alloyed high-speed steel provides excellent toughness, heat resistance and cutting-edge durability for professional tapping.
- DIN 374 standard: Manufactured to the recognised dimensional standard for this type of metric fine machine tap.
- ISO2 (6H) tolerance: Designed to produce the commonly specified 6H internal metric thread tolerance class.
- Form B chamfer: A 3.5–5P cutting lead provides gradual tooth engagement and controlled cutting during through-hole tapping.
- Through-hole application: Form B geometry is designed for holes where chips can move ahead of the cutting action and exit through the workpiece.
- 18.5mm tap-drill diameter: Maykestag specifies an 18.5mm pre-drilled hole for this MF 20 x 1.5 tap.
- Precision dimensions: 125mm overall length with a 25mm cutting section, 16mm shank and 12mm square drive.
Why Choose Maykestag?
Maykestag is an Austrian cutting-tool brand focused on precision-manufactured tools for professional machining. Thread cutting demands particularly accurate geometry because pitch, thread profile, tolerance and cutting-edge condition all directly influence the quality of the finished internal thread. Maykestag provides clearly defined standards, tolerances and application data to help machinists select the correct tap for the job.
The Code 5154 range combines HSS-Co5 cutting material with DIN 374 geometry, ISO2 (6H) thread tolerance and a Form B chamfer. This combination makes the range well suited to controlled production of metric fine threads across the material groups rated by Maykestag.
Designed for Accurate Fine-Thread Tapping
With a nominal MF 20 thread diameter and 1.5mm pitch, this tap is designed specifically for fine-pitch internal threads. The Form B 3.5–5P chamfer progressively brings the cutting teeth into contact with the workpiece, distributing the cutting load over several teeth and helping the tap enter the prepared hole smoothly. Using Maykestag’s specified 18.5mm tap-drill diameter, together with the correct cutting speed, lubrication and machine alignment, helps achieve accurate thread form, dependable tool life and a consistent finished thread.
