The M83248-1-012 is a military specification fluorocarbon (FKM / Viton®-type) O-ring used for sealing in aircraft fuel, oil, and hydraulic systems. It is manufactured under the MIL-PRF-83248 standard, which defines high requirements for dimensional accuracy, material quality, and performance in aerospace applications.

Made from fluorocarbon rubber (FKM), this O-ring provides excellent resistance to aviation fuels, turbine oils, and hydraulic fluids, while maintaining elasticity under elevated temperatures and compression. It is widely used in engine accessories, fuel system fittings, valves, and aircraft hydraulic assemblies where reliable long-term sealing is required.

Compared to nitrile (NBR) seals, this material offers significantly better heat resistance, chemical stability, and lower compression set, making it suitable for flight-critical environments.

Key features include:

Proponent part number: M83248-1-012
Military specification: MIL-PRF-83248 (MS83248 series equivalent)
Material: Fluorocarbon rubber (FKM / Viton® type)
Designed for aircraft fuel, oil, and hydraulic sealing systems
High resistance to aviation hydrocarbons and turbine fluids
Temperature range typically up to ~400°F (204°C)
Low compression set for long-term sealing performance
Suitable for static and dynamic sealing applications
Standard aerospace interchangeable sealing component
Commonly used in aircraft maintenance and overhaul operations