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 5895-01-294-2498
NSN 6240-01-512-1856
NSN 2925-00-035-5633
NSN 6130-01-007-5524
NSN 5998-01-320-7004
NSN 5835-01-582-6045
NSN 5915-00-370-4813
NSN 5930-01-128-5426
NSN 5855-01-386-7323
NSN 4140-01-610-9968
NSN 6135-00-191-6444
NSN 5915-00-104-9960