All Main columns are threaded M8 x 1.25mm and are interchangeable with Kennedy, Oxford, Mitutoyo etc. base units except mini-mag (M6 x 1mm) also suitable for incorporating into special fixtures or threaded pot magnets. Medium Duty Fitment - Plain Fitted as standard to KEN- 333-2080K. Column: 12 x 185mm. Cross bar: 6.3 x 150mm. Threaded: M8 x 1.25mm.