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 5925-01-428-7667
NSN 5950-01-415-5752
NSN 5925-00-249-1287
NSN 4140-01-224-8585
NSN 5985-00-190-1192
NSN 5999-01-634-0576
NSN 5935-01-223-6533
NSN 6610-01-310-0553
NSN 6220-00-821-9387
NSN 5960-01-484-7966
NSN 5999-01-401-5322
NSN 6130-00-001-1368