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 5996-01-226-0606
NSN 5905-01-031-3302
NSN 5935-00-774-8276
NSN 6105-00-647-3955
NSN 5960-01-033-4207
NSN 5920-00-073-8950
NSN 5910-00-350-3539
NSN 6135-01-324-7718
NSN 6240-01-052-2265
NSN 6650-00-249-5553
NSN 5985-01-159-2663
NSN 6685-01-010-2120