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 5930-01-656-3901
NSN 5960-00-409-7769
NSN 6110-01-465-5831
NSN 2925-01-444-6676
NSN 6105-01-514-6890
NSN 5855-01-621-8620
NSN 6610-01-286-6497
NSN 6145-01-142-1603
NSN 5945-01-262-9640
NSN 6135-00-162-2437
NSN 5945-00-644-9269
NSN 6650-01-142-6438