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 5930-01-045-3148
NSN 5910-01-592-3861
NSN 6685-01-362-3503
NSN 5960-00-289-6591
NSN 5960-00-584-4553
NSN 5930-01-606-1741
NSN 5925-01-096-8607
NSN 6645-01-359-1487
NSN 5945-01-556-3304
NSN 6645-01-633-1852
NSN 5935-01-253-2816
NSN 6620-01-440-3523