MIL-PRF-29250C, PERFORMANCE SPECIFICATION LOADING JACK SYSTEM, ISO CONTAINER (24 JUN 1997) [SUPERSEDING MIL-L-29250B (YD)]., This specification covers the International Organization of Standardization (ISO) container loading jack system (ILJS) which is used to provide level loading and unloading on aircraft. The ILJS also is used to provide on and off loading of 102-inch (2 591 millimetre (mm)) wide flatbed trailers and all 25K-loaders, and mobility and maneuverability for freight containers having ISO corner fittings (hereinafter referred to as ISO containers).