The AS568-338 SIMRIZ SZ501 is a precision seal featuring a 3-1/8" inner diameter and a 3-1/2" outer diameter, with a thickness of 3/16". Manufactured by Freudenberg-NOK, this seal is designed for high-performance applications, offering exceptional resistance to chemicals and high temperatures. The SZ501 meets industry standards, ensuring compatibility with a variety of systems. Ideal for hydraulic and pneumatic applications, this seal provides a reliable and durable solution for maintaining system integrity and performance.