Lubrication grooves are a feature of all taps of M3.0 and over. Manufactured to DIN 371/376.
Fluteless - HSS-EV (TiN Coated)
For through and blind holes.
Taper lead to DIN form B
(3.5 x P to 5.5 x P). Tapping tolerance to 6H.
ISO Metric Coarse