MIL-PRF-5606 Hydraulic Fluid, Petroleum Base; Aircraft, Missile, And OrdnanceThis 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 \(see 6.1\). This fluid is identified by military symbol OHA and NATO Code No. H-515 \(see 6.5\).