The M83461/1-018 Packing is a precision elastomer O-ring–type seal manufactured to military specification M83461. It is used in aerospace hydraulic, pneumatic, fuel, and lubrication systems to provide a reliable pressure-tight seal between mating components.

This seal is designed for high reliability under extreme temperature variations, pressure cycles, and exposure to aviation fluids.

Its primary functions include:

Providing leak-free sealing in pressurized aircraft systems
Maintaining elasticity under thermal and pressure cycling
Ensuring system integrity in hydraulic and pneumatic applications

Packings like the M83461/1-018 are critical safety components in aviation systems, preventing fluid or gas leakage that could compromise aircraft performance or operational safety.