Bod is correct... but they don't work very well in my experience. Whilst they do adjust the height of the support bars for the track for the sliding carriage, they still need locknuts really, so there is no advantage in having thumbwheels - you might just as well have two ornery nuts and a washer.
From memory, I think pretty much everything associated with the table top is M5 thread (apart from throat plate screws). Apart from thread length you can pretty much make it up as you go along.
The only thing I would significantly change is the arrangement for the trunnion (tilt hinge) clamps: as fitted on mine, there were separate nuts for each machine screw, and lock washers (useless!). So I made up two plates of the same size (basically straps), with holes for the screws in the same places. I tack welded a nut to each hole - epoxy would probably do it instead, and will fail "gracefully" in this context - so that you can both loosen and tighten the machine screw (one-at-a time!), through the table top, _without_ needing to spanner the nut underneath. Otherwise access to those nuts is horrible once the machine is assembled into its cabinet frame.
Axminster had it the sensible way on the TS 200: a thick steel strap with threaded holes, instead of the two nuts. You could equally well make up the same sort of thing for the Kity, but you can't use the Axminster part though: The trunnion pivots/hinges/mounts on the TS 200 are thinner steel bar than on the Kity (the Kity is considerably stronger in that regard), so the Kity bars will not fit into the equivalent Axminster saddle.
Cheers, E.