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MIL-H-8891 Revision A, January 23, 1978
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HYDRAULIC SYSTEMS, MANNED FLIGHT VEHICLES, TYPE III DESIGN, INSTALLATION AND DATA REQUIREMENTS FOR, GENERAL SPECIFICATION FOR
Includes all amendments and changes through Validation Notice 2, January 29, 2008
Additional Comments: INACTIVE FOR NEW DESIGN
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- This specification covers the design and installation requirements for Type III manned flight vehicle hydraulic systems.

- Type III flight vehicle hydraulic systems for temperature range from −65° + 390°F (see 3.3) shall be of the following classes, as specified:

Class 3, 000 pound per square inch (psi) - Where the cutout pressure at the main pressure controlling device is 3,000 psi.

Class 4, 000 psi - Where the cutout pressure at the main pressure controlling device is 4,000 psi.