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 5915-00-365-9951
NSN 4140-01-301-0577
NSN 5960-00-769-0869
NSN 5990-01-421-3325
NSN 5920-01-105-0684
NSN 5965-00-117-4214
NSN 5985-00-155-8590
NSN 5905-00-446-2772
NSN 6150-01-394-1359
NSN 6135-01-309-8414
NSN 6130-01-528-7813
NSN 5855-01-540-3355