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 5925-01-142-0335
NSN 6620-01-184-7384
NSN 6145-01-246-3827
NSN 6110-01-566-8367
NSN 6145-00-542-7980
NSN 6150-01-523-8994
NSN 6145-01-408-6272
NSN 5935-01-543-9295
NSN 5985-01-515-8115
NSN 5915-01-025-7840
NSN 6135-01-317-6021
NSN 6620-01-534-0898