Fastenal opened its first fastener store in 1967 in Winona, Minnesota. Since then, Fastenal has greatly expanded its footprint as well as its products and services. Today, Fastenal serves its 400,000 active customers through approximately 1,600 branches, over 1,700 on-site locations, and 14 distribution centers. Since 1993, the company has added other product categories, but fasteners remain its largest category at about 30%-35% of sales. Fastenal also offers customers supply-chain solutions, such as vending and vendor-managed inventory.