The Freudenberg-NOK SP444 is a robust PTFE white spiral backup ring, featuring an inner diameter of 7.75 inches and an outer diameter of 8.25 inches. This product adheres to the AS568-444 standard, ensuring it meets industry specifications for sealing applications. Made from high-quality PTFE, it offers superior resistance to chemicals and high temperatures, making it ideal for demanding environments. The 1/4 inch thickness provides optimal support, preventing seal extrusion and enhancing the longevity of your sealing solutions in hydraulic and pneumatic systems.
