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 5930-01-128-1420
NSN 5905-00-276-8597
NSN 6150-01-412-4970
NSN 5935-01-587-3092
NSN 6685-01-630-5459
NSN 4140-01-103-7089
NSN 5895-00-299-1601
NSN 6650-01-154-1870
NSN 6645-01-573-2536
NSN 6135-01-220-7193
NSN 6105-00-279-3044
NSN 6685-00-296-0392