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 6150-00-158-4609
NSN 6620-00-229-2728
NSN 7035-00-797-2635
NSN 4140-01-461-7885
NSN 5990-00-491-1338
NSN 6685-01-254-3490
NSN 5930-01-657-3286
NSN 5985-00-342-9140
NSN 5945-01-548-3740
NSN 5965-00-815-2525
NSN 6620-00-244-8020
NSN 6320-01-498-4954