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 5965-00-557-9112
NSN 5999-00-573-9477
NSN 5925-01-122-6601
NSN 5930-01-109-1458
NSN 6105-01-565-1443
NSN 2925-01-310-3232
NSN 6320-01-198-4024
NSN 5960-01-461-0627
NSN 5920-01-579-5219
NSN 5999-01-428-7793
NSN 6110-01-099-6893
NSN 5930-01-660-0368