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 6220-01-374-6667
NSN 6685-01-422-2229
NSN 6150-00-406-1490
NSN 2925-01-084-3347
NSN 5930-01-141-0166
NSN 5935-01-633-1902
NSN 5990-01-174-4469
NSN 6130-01-078-4632
NSN 2925-01-285-7163
NSN 6240-01-252-1544
NSN 2925-01-327-3069
NSN 6130-00-053-2992