The Freudenberg-NOK SZ495 O-Ring, conforming to AS568-344 standards, features an inner diameter of 3-7/8" and an outer diameter of 4-1/4", with a cross-section of 3/16". This O-Ring is crafted from high-quality materials, providing excellent sealing capabilities in various applications, particularly in hydraulic and pneumatic systems. Its resistance to oils, fuels, and chemicals ensures durability and reliability in demanding conditions. The SZ495 is an ideal solution for engineers looking for compliance with industry standards and dependable performance.