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 5998-00-368-0439
NSN 6130-01-477-4182
NSN 5990-01-652-7373
NSN 5990-01-568-5565
NSN 5905-01-449-1291
NSN 5985-00-141-0290
NSN 5855-01-484-9948
NSN 6610-00-703-8233
NSN 4140-00-257-5215
NSN 6135-00-753-2276
NSN 7035-01-527-1236
NSN 5935-00-398-1584