McMaster-Carr Supply Company

McMaster-Carr Supply Company distributes more than 480,000 mechanical, electrical, and utility products (98% of which are in stock), including air conditioners, clamps, drills, exhaust fans, generators, light bulbs, pipes, pumps, saws, switches, and valves. Family-owned, McMaster-Carr operates through five regional branches in the US that provide customer service, sales, warehousing, and management. Its Chicago headquarters drives IT, purchasing, merchandising, and electronic publishing. Customers order through an online or direct mail catalog. McMaster-Carr caters to industrial and commercial facilities, and federal agencies in the US and abroad.