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 5905-01-129-0539
NSN 5930-01-586-9136
NSN 5975-01-358-3715
NSN 6220-01-384-5297
NSN 5945-00-776-9543
NSN 5905-01-177-8701
NSN 6150-01-186-6903
NSN 6610-01-371-3006
NSN 5915-00-500-8684
NSN 6240-00-469-5100
NSN 5910-00-922-3545
NSN 6650-01-656-2439