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 5999-00-137-7671
NSN 5998-01-222-7383
NSN 5895-00-583-8339
NSN 6645-01-363-5327
NSN 5930-00-912-9130
NSN 4140-01-508-1518
NSN 5930-01-407-7339
NSN 6130-00-925-2303
NSN 6135-00-932-3136
NSN 5985-00-144-8170
NSN 6620-00-911-6747
NSN 6145-00-849-7691