Metaspec manufactures test specimens required by military specification MIL-PRF-6083, which covers the requirements for a rust inhibited petroleum base hydraulic fluid that is intended for use as an operational fluid at high temperatures. This grade of rust inhibited petroleum base hydraulic fluid that is identified by Military Symbol OHT and NATO Symbol C-635. The hydraulic fluid is intended for use as an operational fluid from -54 C to 135 C where corrosion protection is required and it has been determined that MIL-PRF-46170 (FRH) hydraulic fluid cannot be used. This includes use in recoil mechanisms and hydraulic systems for rotating weapons or aiming devices of tactical and support ordnance equipment, except for combat armored vehicles/equipment which require FRH. The hydraulic fluid is also used as a preservative fluid for aircraft hydraulic systems and components where MIL-H-5606 (OHA) or MIL-PRF-87257 is used as an operational fluid.
The following is a list of tests in Specification MIL-PRF-6083 that require test specimens. Some of these tests may be customized for this specification. Click on the test method number for more information about specimens required for each test.
ASTM D6547 - Lubricant Corrosiveness (see also FTM 5322)
To read or download this specification, click below.
This specification supersedes MIL-H-6083.