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 5835-00-725-2087
NSN 7035-01-481-2110
NSN 4140-01-474-1595
NSN 5990-00-985-1334
NSN 6240-01-330-5961
NSN 5930-01-167-4662
NSN 2925-01-142-0981
NSN 6105-01-398-7495
NSN 5996-00-067-8864
NSN 5990-00-382-5885
NSN 6645-00-955-7997
NSN 5910-00-270-6876