The AS568-203 5/16" ID x 9/16" OD x 1/8" SIMRIZ SZ495 O-ring from Freudenberg-NOK is designed for high-performance sealing applications. Made from durable SIMRIZ material, this O-ring offers excellent resistance to chemicals and high temperatures, ensuring longevity and reliability in various environments. With precise dimensions of 5/16" inner diameter and 9/16" outer diameter, it fits standard AS568 specifications, making it compatible with a wide range of systems. Ideal for use in hydraulic and pneumatic applications, this O-ring meets industry standards for quality and performance.