Jody (or should I address you as Mr Big Wig)
Not to derail the OP but this is taken from their site:
Printed Catalog
We produce and distribute a limited number of our 3,600 page catalog to end-users and requisitioners in industrial plants and large commercial facilities. Most of our printed catalogs are mailed to current customers, so we may not be able to fulfill your request for one. For those people, we've provided the entire catalog contents on-line through our Internet Catalog.
Anyhow.... McMaster is the best place IMO to get your bolts screws etc !