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 5920-00-340-3002
NSN 6645-00-057-3499
NSN 2925-01-550-0177
NSN 4140-01-364-1684
NSN 5998-01-509-2819
NSN 4140-01-567-8527
NSN 6650-01-413-8408
NSN 6220-01-406-6792
NSN 6240-01-121-7751
NSN 2925-01-156-9570
NSN 6150-01-468-5900
NSN 5920-00-961-6184