507991 4-hole viton discs for petcocks

These 4-hole Viton rubber discs from MCS are essential replacement components for maintaining a leak-free fuel system. Specifically designed for use in petcocks like the 530068 and similar fuel valves, these discs regulate the flow of petrol. The use of Viton material ensures superior resistance to modern ethanol-blended fuels, which often degrade standard rubber components over time. Replacing these internal seals is a cost-effective way to restore petcock functionality without replacing the entire unit. These discs are sold in packs of 10, providing a convenient supply for mechanics or owners of multiple machines. They correspond to OEM number 507991, ensuring a direct replacement for the original internal hardware.