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 5910-01-387-9656
NSN 6320-01-377-5701
NSN 6150-01-183-2144
NSN 5965-01-459-9659
NSN 5920-00-493-8307
NSN 6610-00-925-0935
NSN 7035-00-406-0568
NSN 5998-00-973-7582
NSN 5895-00-270-6595
NSN 5835-01-369-7837
NSN 5950-01-397-0241
NSN 6685-00-842-8729