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 5935-00-813-0031
NSN 6150-01-355-3510
NSN 5920-00-229-8444
NSN 6685-01-530-1447
NSN 6105-00-941-8351
NSN 5999-01-052-9885
NSN 5915-01-331-4022
NSN 5998-00-464-7765
NSN 5935-00-887-1411
NSN 5960-01-246-4809
NSN 6220-01-448-4110
NSN 7035-01-313-3677