McMaster has a good selection of hardware if you want to order from them. Their website has about anything you'd need as far as head styles (no clutch heads, though). It's a good resource. I bought a hundred 1/4-20 x 3/4 bolts along with nuts, lockwashers and flat washers for my project. But they sent them 2nd day Air $$
. You can specify how you want them sent.
Like bartamos said, a bolt is a bolt is a bolt, no matter where you get them.
