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 5975-01-351-1159
NSN 6105-01-469-2207
NSN 6620-01-408-4464
NSN 5965-00-182-7928
NSN 6320-01-261-2848
NSN 5965-00-908-1402
NSN 2925-01-592-3907
NSN 6150-01-579-7476
NSN 5925-01-380-7283
NSN 6220-01-460-8541
NSN 5985-01-028-1946
NSN 5998-01-491-7644