I am not sure if this has been mentioned anywhere in the forums yet, although I feel as though it probably has, but if you haven’t gone to McMaster-Carr website yet then you may want to do that.
They have pretty much anything I have ever wanted from screws/bolts/nuts to aluminum extrusions, pulleys, linear rails and tons of other stuff that you can get lost in.
I did a search just now on the forums here and found some instances where it has been referenced. Thought I would bring it up again for those who find it difficult to find hardware locally or online. Serves both the metric and imperial worlds in most cases.
I don’t buy from McMaster as much as I used to because I work for a competitor and often get better pricing but McMaster’s CAD files are outstanding. I use them all the time, even if it’s just a nut or bolt. So much easier than drawing from scratch.
MMC is great, but whenever I check they are way more expensive. I have no problem buying stuff there for work (because I charge by the hour there) but I will spend a lot of time at home trying to save a buck.
Checked them out real quick, looks like they have awesome stuff. Checked out their setup blocks, saw the price, fainted but am feeling better now that I’ve recovered.