Used om f-4, phantom aircraft
An item composed of one or more materials, molded, compressed, and/or baked into a rigid covering of irregular shapes and sizes. it is designed to cover air ducts and/or air duct fittings used in air conditioning, heating, cooling, pressurizing and de-icing systems to restrict the dissipation of heat. it may completely or partially encase the item for which designed. it may be furnished with or without fillers, cement, and/or separate or attached accessories for installation, (excluding flexible air duct covering and rigid pipe and pipe fitting coverings used in construction and building materials). Excludes insulation blanket, thermal, aircraft; insulation pipe fitting covering, thermal; and insulation sleeving, thermal.
NSN 5965-01-359-0384
NSN 5960-01-161-7240
NSN 7035-01-123-0085
NSN 5950-01-517-0381
NSN 5915-00-999-2071
NSN 6220-01-222-9045
NSN 5996-01-126-2156
NSN 5999-01-360-4742
NSN 6320-01-481-7322
NSN 5999-01-448-3039
NSN 6320-00-593-0379
NSN 5990-00-173-1432