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 4140-01-416-0705
NSN 6130-00-288-1886
NSN 5950-01-499-8251
NSN 4140-00-279-3148
NSN 5930-01-209-2471
NSN 6685-01-089-8141
NSN 6645-01-275-8436
NSN 6135-01-400-2947
NSN 2925-01-273-4898
NSN 6240-01-530-7485
NSN 5950-00-092-6341
NSN 6685-00-055-5913