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 5950-00-189-0551
NSN 5985-01-276-5488
NSN 6110-01-457-8039
NSN 6135-01-558-4194
NSN 5930-01-523-6704
NSN 5998-01-018-1926
NSN 5925-01-262-6152
NSN 6110-01-289-0552
NSN 6105-00-249-4193
NSN 7035-01-406-5232
NSN 5975-00-759-8353
NSN 5895-01-231-6833