The Freudenberg-NOK SP358 is a PTFE white spiral backup ring designed for optimal sealing performance. With an inner diameter of 5.625 inches and an outer diameter of 6 inches, this backup ring complies with the AS568-358 standard, ensuring it meets industry specifications. The 3/16 inch thickness provides robust support, preventing seal extrusion under pressure. Made from high-quality PTFE, it offers excellent resistance to chemicals and high temperatures, making it suitable for various hydraulic and pneumatic applications.
