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 5855-00-832-9341
NSN 5999-01-250-1666
NSN 5985-01-103-6947
NSN 5990-01-118-8624
NSN 6320-01-160-8578
NSN 6135-01-010-0891
NSN 5990-01-190-8223
NSN 5930-00-762-9928
NSN 6610-00-821-1356
NSN 4140-01-339-2829
NSN 7035-00-020-2227
NSN 6650-01-120-2628