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 2925-01-159-8312
NSN 5910-01-423-8459
NSN 5895-01-364-2464
NSN 2925-01-577-0004
NSN 6130-00-348-1410
NSN 5925-01-524-0448
NSN 7035-00-433-5670
NSN 7035-01-438-2108
NSN 6620-01-553-7917
NSN 6320-01-556-2011
NSN 6645-01-226-2766
NSN 5920-00-449-0063