MIL-P-6640C, MILITARY SPECIFICATION: PNEUMATIC BAG, AIRCRAFT LIFTING, 12-TON CAPACITY, TYPE F-2 (13-NOV-1967)

MIL-P-6640C, MILITARY SPECIFICATION: PNEUMATIC BAG, AIRCRAFT LIFTING, 12-TON CAPACITY, TYPE F-2 (13-NOV-1967)., This specification covers one type of aircraft lifting pneumatic bag, designated type F-2.