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 4140-01-270-3765
NSN 5985-01-386-3655
NSN 2925-01-116-6838
NSN 5915-01-660-7485
NSN 5930-01-346-1678
NSN 5925-00-568-2543
NSN 5960-01-180-4350
NSN 5835-01-398-3859
NSN 6645-01-526-8782
NSN 6145-01-546-2318
NSN 5935-01-251-6723
NSN 5920-00-886-1142