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 4140-01-426-8428
NSN 5998-00-414-7999
NSN 5895-01-361-8917
NSN 5975-01-616-0960
NSN 5920-01-045-1484
NSN 5999-01-100-4194
NSN 5990-01-541-5632
NSN 5990-00-562-8413
NSN 7035-01-067-8991
NSN 5996-00-613-1761
NSN 6320-01-648-5538
NSN 7035-00-329-4015