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 5925-01-424-6744
NSN 2925-00-701-9991
NSN 5910-00-790-0700
NSN 7035-01-338-5930
NSN 6320-00-098-2858
NSN 7035-01-271-1643
NSN 5905-01-172-6452
NSN 5920-01-425-7496
NSN 6145-01-204-7021
NSN 5895-00-910-5849
NSN 5935-01-534-9996
NSN 5985-01-559-8044