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 6645-01-411-5657
NSN 5935-01-029-7612
NSN 5935-01-167-9059
NSN 6145-00-174-9344
NSN 5965-00-951-9961
NSN 6130-00-643-4894
NSN 5996-01-145-8953
NSN 5930-01-156-4327
NSN 5920-01-445-6970
NSN 2925-00-051-1467
NSN 2925-01-289-6448
NSN 5935-01-317-6204