Hydraulic Oil, Hydrocarbon-based, with very high viscosity index and low temperature properties. This specification describes the characteristics and provides the requirements for a petroleum base hydraulic fluid for use in the -54 Deg. C to +135 Deg. C temperature range.

supercedes MIL-H-5606

hydraulic fluid

The hydraulic fluid covered by this specification is intended for use in automatic pilots, shock absorbers, brakes, flap-control mechanisms, missile hydraulic servo-controlled systems, and other hydraulic systems which use synthetic sealing material.

Inactive for new design after 29 March 1996. For new designs, use MIL-PRF-87257 or MIL-PRF-83282