The base flange is designed as a fixation flange. Normally used as a wall or base flange, where only positional fixing is required.
MK Base Flange 20 NB (26.9mm OD)
MK Base Flange 25 NB (33.7mm OD)
MK Base Flange 32 NB (42.4mm OD)
MK Base Flange 40 NB (48.3mm OD)
MK Base Flange 50 NB (60.3mm OD)