I just tried both, but grainger seems so overwhelming when I'm working on my own. I'll try again tomorrow when my mentor is actually here to help. The second one doesn't seem to actually sell anyhing, and even if they did, they do not seem to have the type we need. Thanks for the suggestions though
We're looking for a way to extend the output shafts on the CIMple boxes, which would require a 1/4-20 threaded end, and a 1/2" diameter for the shaft.