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 5985-00-808-0796
NSN 5905-00-816-9679
NSN 6685-01-445-2822
NSN 5930-01-353-7398
NSN 5999-01-444-2091
NSN 7035-01-359-1761
NSN 5935-01-235-2195
NSN 6645-01-476-8013
NSN 7035-01-487-5842
NSN 5855-01-542-9059
NSN 6110-00-057-2432
NSN 4140-01-634-0330