Allegheny York Co. is a leading manufacturer and distributor of quality seals and packings for commercial, industrial and military applications. AY has been serving the hydraulic and pneumatic industry for over 40 years. We are dedicated to fast, reliable, hassle-free service to our customers. We have one of the largest warehouses in the world devoted to seals and packings in both METRIC and INCH sizes. Engineering services are available. Custom seals manufactured by molding and machine processes can be supplied to YOUR specifications.