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 5835-01-411-8897
NSN 5998-01-158-5544
NSN 6240-01-361-9167
NSN 5999-01-013-9236
NSN 5990-01-150-7443
NSN 5855-01-398-9548
NSN 5935-01-612-7607
NSN 6135-00-128-1633
NSN 5855-01-388-1970
NSN 5945-01-093-9642
NSN 6620-00-461-4934
NSN 6130-01-483-2111