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 6150-01-556-7309
NSN 6135-00-985-7845
NSN 5990-00-991-8723
NSN 5998-00-629-3066
NSN 2925-00-265-7539
NSN 5925-00-205-2767
NSN 2925-00-192-1166
NSN 6105-01-546-7832
NSN 5990-01-136-4068
NSN 6650-01-412-1040
NSN 6135-00-080-9176
NSN 6150-01-380-3080