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 5960-01-449-1310
NSN 6610-01-129-1053
NSN 6610-00-149-1534
NSN 5895-00-181-6105
NSN 5930-00-484-5043
NSN 5905-01-439-0771
NSN 5930-01-490-1807
NSN 5975-01-236-5722
NSN 5998-01-066-2175
NSN 7035-01-037-7400
NSN 5905-01-409-2951
NSN 5990-00-125-5036