Family-run since founder Robert J. Key established it in 1967, Key Bellevilles Inc. has made Leechburg, Pennsylvania, its home for more than five decades. The company is known for concentrating exclusively on Belleville disc springs, which it manufactures in the United States for customers around the world. Its 88,000-square-foot plant sits on a 200-acre site, and its quality system complies with ISO 9001 standards.
ISO 9001
BelleFlex Technologies, LLCBelleFlex Technologies is a U.S.-based manufacturer with more than 100 years of combined engineering and manufacturing expertise, known for supporting demanding applications where component reliability matters. From its Pennsylvania facility, the company works directly with customers to develop Belleville disc springs and related custom parts for industries ranging from aerospace to energy, including applications on the International Space Station. BelleFlex is ISO 9001 certified and ITAR registered.332613FORD CITY, PA
Solon Manufacturing CoEstablished in 1949, Solon Manufacturing Co. is a Chardon, Ohio maker known for keeping its production under one roof in the United States. Its engineering-led team develops Belleville springs and washers for customers whose bolted joints must remain dependable through demanding operating conditions, with products reaching more than 60 countries. Solon is ISO 9001:2015 certified.CHARDON, OH
Diamond Wire Spring CompanyFounded in Pittsburgh in 1939, Diamond Wire Spring Company designs and manufactures industrial custom and stock springs and wire forms. Still independent and third-generation family-owned, the American manufacturer serves customers from three ISO 9001:2015-certified plants and a stock warehouse, with thousands of springs available for same-day shipment. Its long history includes specialized work for demanding fields such as rail transportation and medical equipment.GLENSHAW, PA