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 6240-01-106-6113
NSN 4140-01-597-1299
NSN 6685-01-459-8719
NSN 6150-01-556-6574
NSN 6685-01-463-9153
NSN 6130-01-328-9109
NSN 6685-01-010-8478
NSN 6240-00-194-3304
NSN 5950-01-124-8843
NSN 5999-01-595-7116
NSN 6320-01-411-7469
NSN 5965-01-361-9760