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 6645-01-394-5149
NSN 6685-01-516-0013
NSN 6135-01-274-3546
NSN 2925-01-180-2960
NSN 6650-01-462-8963
NSN 6145-01-658-4938
NSN 5945-01-089-6679
NSN 6130-01-284-0269
NSN 6145-01-437-6777
NSN 5910-01-394-5013
NSN 6645-00-794-4576
NSN 5855-00-797-8217