The MS28775-229 is an aerospace-standard O-ring sealing element (packing) used in aircraft hydraulic, fuel, and pneumatic systems. It provides a reliable leak-proof seal between mating components such as fittings, valve housings, pumps, and actuator assemblies.

This O-ring is a direct functional alternative to AN6230B7, offering equivalent dimensional fit and sealing performance for approved aerospace maintenance and replacement use. It is suitable for both static sealing applications and light dynamic interfaces depending on system design.

Manufactured to MS specifications, it is typically made from FKM (Viton-type) or equivalent aerospace-grade elastomer, providing strong resistance to aviation fluids, hydraulic oils, fuels, and environmental aging.

Key features include:

MS28775-229 aerospace O-ring seal
Alternative to AN6230B7
Used in hydraulic, fuel, and pneumatic systems
Provides reliable pressure-tight sealing
Resistant to aviation fluids and oils
High temperature and pressure capability
Suitable for vibration and cyclic loads
FKM (Viton-type) elastomer construction
Used in valves, fittings, pumps, and actuators
Direct replacement per MS aerospace hardware standards