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 5960-00-723-2793
NSN 5835-01-576-9013
NSN 6320-00-139-1090
NSN 5835-00-003-0295
NSN 6650-01-557-6366
NSN 6110-01-011-8083
NSN 6150-01-381-5639
NSN 6620-00-017-3901
NSN 6620-00-169-1609
NSN 5998-00-891-5932
NSN 5998-00-583-8617
NSN 5975-00-433-5983