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 5965-01-359-5501
NSN 5915-00-725-5456
NSN 5999-01-417-4404
NSN 5925-01-129-0061
NSN 5915-00-387-2333
NSN 5965-01-234-6844
NSN 5930-01-112-0157
NSN 4140-01-202-5600
NSN 6650-01-032-1786
NSN 4140-00-948-3663
NSN 6610-01-255-1433
NSN 5975-01-346-9696