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 5905-01-319-4805
NSN 6145-00-419-0550
NSN 5935-01-596-9554
NSN 6320-00-483-0451
NSN 5835-01-354-0566
NSN 5930-01-026-7729
NSN 5990-01-633-9503
NSN 5915-01-488-7654
NSN 5855-01-376-0363
NSN 2925-01-218-5556
NSN 6135-01-526-6530
NSN 6645-01-442-6476