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 5960-01-064-7121
NSN 6645-01-394-5149
NSN 5945-01-512-6633
NSN 5935-00-067-6775
NSN 5945-00-499-3934
NSN 5996-01-658-9316
NSN 5965-01-246-6162
NSN 5925-01-163-8562
NSN 6105-01-463-7677
NSN 5835-00-033-0294
NSN 6320-00-242-3300
NSN 5910-01-150-3496