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 5950-00-457-5751
NSN 6240-01-100-7105
NSN 5965-01-153-1965
NSN 6110-01-645-8549
NSN 5910-01-217-5300
NSN 7035-01-251-9566
NSN 6240-00-146-9322
NSN 5930-00-060-1637
NSN 5950-01-432-2038
NSN 6650-01-344-9410
NSN 6135-01-186-4010
NSN 5998-01-293-0453