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 4140-01-261-4741
NSN 5920-01-100-3018
NSN 6320-01-326-1316
NSN 5910-00-964-9981
NSN 5855-00-466-2309
NSN 5998-01-229-1699
NSN 2925-01-554-1474
NSN 5935-00-716-7125
NSN 5905-01-643-3318
NSN 6650-00-071-0612
NSN 5905-00-936-9153
NSN 5975-01-124-5555