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 6320-01-643-0850
NSN 5999-01-141-6859
NSN 5990-00-629-2794
NSN 6645-01-400-2119
NSN 5950-01-146-7023
NSN 5985-00-736-6073
NSN 5915-01-625-3376
NSN 5960-01-623-7202
NSN 5996-01-386-4230
NSN 5895-01-198-2228
NSN 5925-01-531-2801
NSN 5920-00-606-8699