The Freudenberg-NOK Dichtomatik OR 0.859" 0.139" 90 FKM V903Z O-ring is engineered for optimal sealing performance in harsh environments. Constructed from high-grade Fluoroelastomer (FKM), it provides superior resistance to heat, chemicals, and fuels, making it ideal for automotive and industrial uses. With a diameter of 0.859 inches and a cross-section of 0.139 inches, this O-ring adheres to ISO standards, ensuring reliability and compatibility across different systems. It operates effectively within a temperature range of -15°F to 400°F, making it a robust sealing solution for various demanding applications.