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 5998-01-225-5530
NSN 5835-00-137-5093
NSN 5855-00-149-0766
NSN 5990-01-174-6851
NSN 5835-01-074-7593
NSN 5935-01-408-4350
NSN 6150-01-173-3292
NSN 5990-01-187-5420
NSN 5950-01-487-3750
NSN 5965-00-768-4366
NSN 5985-01-209-3042
NSN 6105-01-353-4981