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 5985-01-550-4803
NSN 6105-01-031-0854
NSN 5835-01-229-6964
NSN 5999-01-092-5941
NSN 4140-01-182-5861
NSN 5925-00-190-0095
NSN 6220-00-092-5644
NSN 5960-01-641-5493
NSN 5965-01-417-3211
NSN 6110-00-828-7117
NSN 4140-01-175-7081
NSN 5975-01-114-1092