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 6145-00-409-6844
NSN 6320-01-355-3998
NSN 5905-01-151-4410
NSN 6645-01-079-3741
NSN 5910-01-356-8922
NSN 5996-01-590-9918
NSN 5998-00-192-3300
NSN 5935-00-215-6206
NSN 5855-00-494-9581
NSN 5855-01-446-0527
NSN 5999-01-495-4865
NSN 5910-01-240-0402