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 4140-01-493-6525
NSN 2925-00-336-8364
NSN 5998-01-344-0994
NSN 6150-01-176-0221
NSN 2925-01-239-6044
NSN 5999-00-293-4326
NSN 6150-00-274-9422
NSN 5975-00-498-9357
NSN 5950-01-337-5546
NSN 6685-00-813-9653
NSN 5990-01-392-5682
NSN 5985-00-727-4376