For more than 40 years, Allegheny York has worked with manufacturers, nationally and internationally, in the development and ... application of engineered sealing solutions and in the supply of custom pneumatic/hydraulic seals, o-rings, hydraulic packings, gaskets, machined parts and more. Our multi-million dollar Standard & Metric inventory and diverse line of products, services and technical assistance are always available. We are always striving to provide our customers with more options, higher quality products and reliability at fair pricing! Call AY 1st! What can we design and manufacture for you today? read more