Aeroshell Fluid 4, MIL-H-5606A (55 GALLON DRUM)
Aeroshell Fluid 4 is a mineral oil based hydraulic fluid containing an oxidation inhibitor and a non-zinc anti-wear additive. It is dyed red for identification and leak detection purposes. It may be used in aviation and industrial hydraulic systems where very low temperature flow properties are desired and synthetic rubber seals are in use. It is not recommended for systems using natural rubber seals.