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 6645-01-545-6853
NSN 5985-01-464-4302
NSN 6610-01-502-2456
NSN 6620-01-215-7979
NSN 5990-00-804-4982
NSN 6135-01-449-2144
NSN 6110-01-301-2255
NSN 6645-00-171-9639
NSN 5910-01-554-2308
NSN 6645-01-208-5090
NSN 5925-00-265-9488
NSN 5999-00-308-4298