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 4140-01-533-3139
NSN 5999-00-108-8499
NSN 5925-00-127-1436
NSN 6240-00-280-8502
NSN 6610-01-116-2527
NSN 4140-01-430-6947
NSN 2925-00-707-6770
NSN 6650-01-068-3997
NSN 6650-00-053-4907
NSN 6135-00-321-6707
NSN 5925-01-309-3951
NSN 5855-00-962-5792