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 5990-01-239-1474
NSN 5975-00-162-9530
NSN 6645-01-422-9672
NSN 6620-00-197-5130
NSN 6650-01-115-7981
NSN 5985-01-025-9711
NSN 4140-01-505-9088
NSN 6220-01-381-1074
NSN 6130-01-076-5968
NSN 2925-00-555-0584
NSN 5999-01-213-1098
NSN 5975-01-563-3995