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 6620-01-417-3314
NSN 5930-00-835-9945
NSN 5915-01-641-6139
NSN 5925-01-528-7612
NSN 5999-01-598-2157
NSN 6135-00-152-8729
NSN 5915-00-518-1644
NSN 5905-01-609-0988
NSN 6105-00-964-4060
NSN 5855-00-256-5562
NSN 6610-01-252-8201
NSN 4140-01-123-9149