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 6620-01-212-4298
NSN 6130-01-571-5612
NSN 6645-01-025-1002
NSN 6610-01-140-3634
NSN 6650-00-140-1854
NSN 5960-00-053-4750
NSN 5835-01-642-4705
NSN 5999-01-461-5470
NSN 5996-01-194-5249
NSN 5915-00-857-3007
NSN 6130-01-068-4002
NSN 5905-00-419-7533