Fastener Express carries industrial strength rivets in a variety of sizes and materials. Rivets are generally used for attaching pieces of metal together. The shaft of a rivet is installed through a pre-drilled hole, and the end of the rivet flattens out to lock the fastener in place. The factory head is the original head, and the shop head is the flattened end of the shaft. Different materials provide support for various metals. If you have any questions, please use the "Contact Us" link at the top of the page.