MIL-H-46170 -20°F TO +275°F Chemical compatibility with O-rings, rubbers, & plastics

MIL-H-46170 is a military specification hydraulic fluid formulated for aerospace and defense hydraulic systems operating between approximately -20°F and +275°F. These fluids are designed to provide stable viscosity, low volatility, and reliable performance under high pressure conditions. They are commonly used in landing gear, braking systems, and aircraft flight control hydraulics. In such equipment, compatibility with O-rings, rubber seals, gaskets, and plastic components should be evaluated to ensure reliable sealing performance. Proper storage, contamination control, safe handling procedures, and appropriate PPE are recommended to maintain system safety and reliability.

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