20.610 in.Lg, 2.500 in.Id, 0.380 in.Thk;
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 6320-01-436-0513
NSN 6650-00-864-2942
NSN 4140-01-183-3172
NSN 5965-01-104-8559
NSN 5855-01-380-2896
NSN 5965-00-471-5018
NSN 6150-00-647-3285
NSN 7035-01-479-5268
NSN 6135-01-534-3007
NSN 6645-01-337-1806
NSN 6320-01-426-8947
NSN 5930-01-220-0454