The SMC AS568-012 (NBR) O-Ring is engineered for high-performance sealing in hydraulic applications, particularly in the aviation industry. With dimensions of 3/8" ID x 1/2" OD, this O-Ring offers superior resistance to oil, gasoline, and petroleum-based hydraulic fluids, ensuring optimal protection against fluid and particle ingress. Manufactured by SMC, a leader in pneumatic automation products, this O-Ring is designed to withstand various environmental factors, making it ideal for maintaining controlled internal environments.