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 5905-00-501-8630
NSN 5935-01-383-8595
NSN 6220-01-176-9139
NSN 6220-01-120-4829
NSN 6620-01-461-0899
NSN 6620-00-262-3113
NSN 5950-01-290-1768
NSN 5960-00-946-7767
NSN 5990-01-632-0969
NSN 5935-01-594-6299
NSN 5930-01-602-9356
NSN 6645-01-541-9114