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 4140-00-018-6535
NSN 5998-01-270-8013
NSN 5920-01-251-8746
NSN 5945-01-634-0588
NSN 6645-00-557-0322
NSN 5996-00-426-7370
NSN 5996-00-497-8425
NSN 5998-01-143-7985
NSN 6645-01-304-0889
NSN 6135-01-142-6456
NSN 5960-01-231-3484
NSN 5960-00-379-4466