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 6685-01-278-2981
NSN 6620-00-956-2605
NSN 5855-01-658-4510
NSN 4140-01-067-8242
NSN 4140-01-446-6007
NSN 5985-01-140-0092
NSN 5996-01-217-3670
NSN 5945-00-274-4204
NSN 6240-00-287-1988
NSN 5915-00-733-5893
NSN 2925-01-208-6638
NSN 5910-01-222-2676