(This was all on tnutz)
The actual internal fasteners... I ordered 10 series to start with and 40 series with a later order all with 1/4-20 threading so im not sure which ones I used and to check back there would be a neck cracking good time now lol.
But I'd say measure your opening with a pair of calipers depth width and all that and see if it will fit with the measurements they have online on the fasteners product page.
When I get home I'll try to see if I can tell or not and let you know.
Bolts were 1/4-20 1/2 inch black button head screws and some washers to go with them.
To mount to the stand I used their "(CB-010-G) 6 Hole Inside Corner Bracket"
As far as extrusions it was all their EX-1010 1" smooth extrusions at the lengths I needed.
Although the top piece that I mounted my main LED fixtures to was a EX-1050-BLACK - 1" x 0.5" thinner piece that I had machined with two access holes "Access Hole - Style "C", thru "R"" which would have them drill a hole a half an inch from the end right in the middle of the extrusion which let's you run a bolt through it to attach to the main structure I built.
There it is in its finished state.