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 5960-01-533-5162
NSN 6610-00-943-5588
NSN 5999-01-039-9407
NSN 6220-00-202-8591
NSN 5990-01-649-0635
NSN 6685-01-065-7042
NSN 5930-01-630-7871
NSN 4140-01-369-1615
NSN 5960-00-289-6591
NSN 6650-01-024-9554
NSN 5855-01-502-2789
NSN 5915-00-077-5555