My guess is that the G0484 table is actually machined to metric specs, which end up being close enough to imperial spec that Grizzly can get away with selling some extra-narrow '0.55-inch' t-slot nuts to make up the difference. It turns out that the G0484 slots are actually 0.55 inches wide, which seems like an odd number - unless you convert to metric and realize that this is extraordinarily close to 14mm.
Because the catalog page for the G0484 lists the slots as half-inch, just like the BP clones, I assumed that the standard kit would work fine. The common 1/2' clamping sets come with t-slot nuts which are made to fit 5/8' slots. Typical 'Bridgeport' slot width is, as far as I can tell, 5/8' (0.625 in). I got my new G0484 wired and powered up this weekend, and in the process discovered something: it has a decidedly non-standard T-slot width.
