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 5960-01-599-9821
NSN 5835-00-351-9459
NSN 5975-00-015-7919
NSN 6110-01-473-5168
NSN 6610-00-943-3136
NSN 5999-01-242-5049
NSN 2925-01-294-9823
NSN 5930-00-462-7213
NSN 6240-00-717-0844
NSN 5998-01-461-5547
NSN 6240-01-385-7079
NSN 5855-01-406-6261