A factory runs on machines. Machines run on bolts, screws, nuts, and fasteners. When a bolt fails on a production line, the line stops. Every hour of downtime costs thousands. Fastenal understood this in 1967 and built a solution: put a vending machine full of fasteners inside the factory. The factory never runs out. Fastenal gets paid automatically. 3,000+ factories have Fastenal vending machines embedded in their floors. The hardware store moved inside.