MIL-T-52983G, MILITARY SPECIFICATION: TANKS, FABRIC, COLLAPSIBLE: 3,000, 10,000, 20,000, AND 50,000 GALLON, FUEL (11 MAY 1994)., This specification covers collapsible fuel tanks: 3,000, 10,000. 20,000, and 50,000 gallon, complete with fittings, berm liners, accessories, and repair items packed in a box.