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 5999-00-421-5134
NSN 5975-01-538-1430
NSN 5975-00-397-9533
NSN 6220-01-317-3283
NSN 6685-00-887-3441
NSN 4140-01-594-3096
NSN 5855-01-068-3683
NSN 6320-01-331-6947
NSN 6105-01-410-7634
NSN 6145-01-378-4321
NSN 5950-01-117-6351
NSN 5998-00-542-6224