The problem with my T-slot vis-a-vis yours is that the height of the bottom (widest part of slot) is 5/32 or 4mm. Phillip, the outboard fence on your shaper is where i was headed initially, and intended to do the holes in a pattern that would fit the Panhans or Rangate sliding table (which i do not have, but a guy can dream) but changed paths when i focused upon the T-slot. Also, since i will have the power feeder pushing against the outboard fence i was hoping for something sturdier. The toilet bolts are 3/4 long and my slot, at the surface is 3/4. Jamie, Toilet hold-downs do well on the T tracks in my Woodpecker's drill press table, but the slots on the machine top are way different. So, rather than re-inventing the wheel, might i ask what you gents have used in similar situations? I assume most T slot on table saws and shaper and WWing tools is relatively standard, but i am perplexed as it seems i am hunting for a unicorn. Back to the diagrams but not finding something to fit. Went back tot he McMaster Carr site and struggled a bit with the diagrams and ordered some small ones (91523A628 with 3/8'-16 thread, 1 1/2' long)yesterday and was amazed they arrived today (yes, i was impressed) but they are too big. Went to a specialty bolt shop in town but they had nothing suitable. Seemed like an elegant solution, and an obvious choice. I went to the McMaster Carr catalog, thinking i would get hex head bolts to slide into the T slot. I want to invert 2 bolts in the T-slot and use 2 thread-through knobs to tighten down the plywood on top of the cast iron table. I want to make an outboard fence for my Powermatic 2700 shaper.

Toilet bolts in t slot hold down