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 5998-01-480-8699
NSN 5935-00-233-6971
NSN 5999-00-169-7935
NSN 5915-01-468-6362
NSN 5945-00-276-9274
NSN 6650-01-633-9147
NSN 5985-01-073-5602
NSN 5960-01-328-8248
NSN 6620-01-116-3983
NSN 6240-01-209-4391
NSN 6220-01-424-3665
NSN 5950-01-568-7016