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 5950-01-279-4095
NSN 5920-00-288-5849
NSN 5925-00-006-3539
NSN 7035-01-516-0034
NSN 5998-01-233-5938
NSN 6105-00-904-8190
NSN 5990-00-905-6472
NSN 2925-00-099-4030
NSN 6220-00-727-7547
NSN 7035-00-145-9138
NSN 5915-01-348-8831
NSN 6130-01-467-7844