T nut sizes?

Anyone know the exact size roll in t nuts for prinsu and up top racks?

Looking at these on Amazon, not sure if the 4040 series 8M will fit or not...

$12 Odinest T Nuts Tee Sliding Slot Nuts 40 Series M8 Threaded Slide in Pre-Assembly for 40x40 Aluminum Extrusions Frame with Profile 4040 Sereis 8mm Slot for CNC Router Build Rail 3D Printer 12pcs

Odinest T Nuts Tee Sliding Slot Nuts 40 Series M8 Threaded Slide in Pre-Assembly for 40x40 Aluminum Extrusions Frame with Profile 4040 Sereis 8mm Slot for CNC Router Build Rail 3D Printer 12pcs

 

Sounds like it's for an 8mm bolt and a 8mm channel

 

Problem is I can't find what size channel the extrusions are on prinsu and uptop racks.

 

Do you have one of those tracks now?

 

Yes

 

You could always go measure it...

 

Were you able to figure out if these are the correct size t nuts? I'm also looking for some

 

I bought a set of 2020's through 4040's, I'll update as soon as they come. They're supposed to arrive on Monday.

 

Sweet, sounds good!

 

Got 20, 30, and 40 series in M3-M6. None of them fit.

 

Prinsu is 10 series extrusion. I have an RCI rack that uses the same size. I ordered these and they’re great:

$9 Axageid 20 Packs 1/4-20 Threaded Steel Roll in T-Nut with Ball Spring, T Slot Accessories for Aluminum Extrusion Profile Rail

https://www.amazon.com/dp/B0C4MW5GJL

You can also use 1/4-20 carriage bolts but I’ve found they vary slightly in size, so some fit and some are VERY snug.