Greetings-
What are the bolts that secure a vise to the channels on a drill press table called?

It looks like something specific would be made for this- almost like a carriage bolt- but I have just been using regular & irregular bolts & washers. I takes up a lot of time to shift the vise around the way I'm doing it, so I'd appreciate if somebody'd tell me what to go look for.

Vise bolt channels

Thanks!
Brad


Wrench Fetcher, PhD