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 6645-01-250-5154
NSN 5905-00-840-0186
NSN 5998-01-287-8331
NSN 5920-01-134-1673
NSN 5905-01-259-2637
NSN 5895-00-852-4237
NSN 5835-01-303-6563
NSN 6240-01-126-9167
NSN 6135-01-219-8612
NSN 6110-00-395-2076
NSN 6685-00-914-5942
NSN 6130-00-019-3032