Amazon.com has launched Amazon.com Industrial & Scientific, a site dedicated to providing thousands upon thousands of products and materials selections online, in one spot. For manufacturers.
Timken. Sandvik. Saint-Gobain. SKF. Huge brands, presented in a comparative, easy to use format. They even stock shopfloor products like safety glasses, gloves, and hand tools. What's not to like?
(If you're MSC or Thomas, you really don't have to answer that.)