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 6610-00-415-6410
NSN 5920-00-973-8366
NSN 6130-00-252-6407
NSN 6645-01-324-5621
NSN 5935-01-182-9634
NSN 6610-01-339-1595
NSN 5999-01-214-4205
NSN 6130-01-443-6655
NSN 6145-01-188-2789
NSN 5930-00-398-1517
NSN 6105-00-809-1180
NSN 5945-01-287-8230