MAYKESTAG HSSE-V3 Speedtap-Inox Machine Tap M12 x 1.75 Spiral Fluted DIN 376 6H VAPO

Maykestag HSSE-V3 Speedtap-Inox Machine Tap M12 x 1.75 VAPO

Professional M12 x 1.75 Speedtap-Inox machine tap manufactured from HSSE-V3, featuring 40° spiral-fluted geometry, ISO2 (6H) thread tolerance, short C chamfer and VAPO surface treatment for precision tapping of metric ISO threads in blind holes.

The Maykestag Code 4657 Speedtap-Inox is a precision spiral-fluted machine tap developed for producing metric ISO internal threads, with particularly strong suitability for stainless steels and a broad range of conventional steels. The 40° spiral flute geometry directs chips back towards the entrance of the hole, making the tap especially suitable for blind-hole applications where controlled chip evacuation is essential. This M12 version produces an M12 x 1.75 thread to ISO2 (6H) tolerance and is manufactured to DIN 376.

Product highlights

• Speedtap-Inox design: Professional machine tap geometry developed for reliable thread production, with excellent catalogue suitability ratings for stainless steels.
• M12 x 1.75 metric thread: Produces standard metric ISO M12 threads with a 1.75mm pitch.
• HSSE-V3 cutting material: High-performance high-speed steel grade selected for demanding professional tapping applications.
• 40° spiral flutes: Helical flute geometry draws chips back towards the hole entrance, making the tap particularly suitable for blind holes.
• VAPO surface treatment: Vapour-treated surface helps retain cutting lubricant and reduces the tendency for workpiece material to adhere to the cutting surfaces.
• ISO2 (6H) tolerance: Produces standard 6H tolerance internal metric threads.
• C chamfer: Short 2–3 pitch chamfer geometry suited to blind-hole tapping applications.
• DIN 376: Manufactured to the specified dimensional standard for machine taps.
• Four-flute design: The M12 tap uses four flutes for cutting and chip evacuation.
• Blind-hole capability: Maykestag specifies the Code 4657 series for thread depths up to ≤2.5 x d1.

Designed for Controlled Blind-Hole Tapping

Blind-hole tapping places particular importance on chip control because the chips cannot pass through the opposite side of the workpiece. The 40° spiral flutes of the Speedtap-Inox direct chips back towards the entry of the hole, helping keep the cutting zone clear. Combined with the short C chamfer and VAPO-treated surface, this geometry supports controlled cutting, reliable thread formation and efficient lubrication when the correct cutting speed, tapping lubricant and machine conditions are used.