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 6130-00-418-4643
NSN 6105-00-395-1374
NSN 5999-00-799-5539
NSN 6320-01-054-3046
NSN 6320-01-103-1655
NSN 5950-01-162-3759
NSN 6145-01-423-8470
NSN 6145-01-358-9979
NSN 6135-01-653-6113
NSN 6645-00-100-7218
NSN 5960-01-003-5819
NSN 4140-01-226-2182