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 5910-01-340-6217
NSN 5960-01-543-0235
NSN 4140-01-465-4721
NSN 6150-01-506-0555
NSN 5985-01-235-1656
NSN 7035-00-981-7216
NSN 5855-00-310-2740
NSN 6610-01-444-2050
NSN 7035-01-467-8921
NSN 6610-01-077-6783
NSN 5999-00-758-8422