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.
NSN 4140-01-461-7885
NSN 2925-01-472-4423
NSN 5925-01-097-1748
NSN 6145-00-466-4068
NSN 6135-00-838-0706
NSN 6650-01-476-2358
NSN 5895-01-334-9431
NSN 5835-01-587-8787
NSN 7035-00-312-3055
NSN 6135-00-998-5884
NSN 6110-00-712-8538
NSN 7035-00-523-7492