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 4140-01-208-6568
NSN 5915-01-257-7354
NSN 6240-00-251-5235
NSN 6645-01-322-8431
NSN 7035-01-418-5499
NSN 5925-00-439-4025
NSN 6240-01-381-2275
NSN 5985-00-131-4315
NSN 6105-01-289-1082
NSN 5999-01-201-0693
NSN 5895-01-523-9069
NSN 6645-00-479-9334