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 6645-01-025-1002
NSN 6105-01-391-7500
NSN 6620-00-782-0337
NSN 6320-01-492-1976
NSN 5965-01-476-0721
NSN 5855-00-933-8286
NSN 5945-01-209-6507
NSN 5925-01-146-5528
NSN 7035-01-491-3981
NSN 6610-00-458-5444
NSN 6685-01-583-6756
NSN 6130-00-900-4758