The foot thread on 3010, 3020 & 3090C is
M4 The thread for the spikes and feet on
the 3030FSI & 3000ST stands, 3050 & 3050i loudspeakers is M6 (thread pitch 1.0mm) The thread for fixing the wall bracket
is M8
3010i Feet
The rubber feet extend approximately 3mm from the base.