The MS28775-210 O-Ring is a high-performance sealing component designed for use in aircraft fuel, oil, and hydraulic systems. It is manufactured in accordance with the MS28775 military specification, ensuring compatibility with aerospace requirements for reliability and durability.

This O-ring serves as an alternative to part number 484-790 and is typically made from fuel- and oil-resistant elastomer materials suitable for demanding aviation environments.

Its primary functions include:

Providing a leak-proof seal between mating surfaces in fluid systems
Resisting fuel, oil, and hydraulic fluid degradation
Maintaining sealing performance under pressure, temperature changes, and vibration

MS28775 series O-rings are commonly used in engine systems, fuel lines, and hydraulic assemblies, where dependable sealing is critical for safe aircraft operation.