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 5999-01-177-4119
NSN 5960-01-597-6288
NSN 6110-01-271-6979
NSN 5895-00-758-3096
NSN 5925-01-474-4244
NSN 6145-01-416-5808
NSN 6240-00-229-8183
NSN 6620-01-350-5103
NSN 5905-01-359-4050
NSN 2925-00-468-5273
NSN 4140-00-239-9174
NSN 5996-00-456-0895