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 6240-00-222-0276
NSN 5945-00-954-3761
NSN 4140-00-832-3286
NSN 6220-01-116-2411
NSN 6645-00-482-8457
NSN 6645-01-470-9599
NSN 5930-00-170-5567
NSN 5910-00-212-5969
NSN 5920-01-643-1076
NSN 6620-01-227-0433
NSN 6645-01-305-9135
NSN 5910-00-753-2850