Why Choose Marmon/Keystone
Hydraulic Supply Company proudly carries a full range of Marmon / Keystone tubing products. Known for quality, reliability, and precision, Marmon / Keystone supplies high-performance metal products that meet the demanding standards of hydraulic, pneumatic, and industrial applications.
Founded in 1907, Marmon / Keystone has built more than a century of expertise in metal distribution and processing. As a Marmon / Berkshire Hathaway company, it operates one of North America’s largest inventories of carbon steel, stainless steel, aluminum, and alloy tubing and bar products. With strategically located service centers and advanced processing capabilities, Marmon / Keystone delivers the right materials—cut, formed, and finished to specification—with consistency and speed.
From hydraulic and pneumatic systems to structural and mechanical applications, Marmon / Keystone’s products are engineered and manufactured to perform in demanding industrial environments. Their focus on precision, service, and logistical efficiency makes them a trusted partner for OEMs, fabricators, and maintenance professionals alike.
Marmon / Keystone’s mission is to provide high-quality metal solutions, outstanding customer service, and supply-chain efficiency that help customers achieve greater reliability, performance, and cost-effectiveness in their operations.