4 inches long
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 6685-01-034-2277
NSN 6320-01-608-1935
NSN 6130-01-363-5288
NSN 5950-01-388-2548
NSN 5855-01-110-9564
NSN 6145-00-539-9799
NSN 6240-01-442-7746
NSN 5935-01-073-7279
NSN 5960-01-391-4701
NSN 4140-00-435-0436
NSN 6320-00-646-3311
NSN 5996-01-400-3558