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.
Classification: Other parts of airplanes or helicopters for use in military aircraft (excludes propellers, rotors, undercarriages, and parts thereof)
NSN 6650-00-717-4464
NSN 5998-01-607-5340
NSN 5935-01-484-3644
NSN 5998-01-585-4729
NSN 6645-01-566-1386
NSN 4140-01-175-6035
NSN 5996-01-645-9422
NSN 5935-01-154-7922
NSN 5945-00-813-3840
NSN 6135-00-010-5275
NSN 6650-00-904-0085
NSN 5999-01-101-3602