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 5985-00-917-2290
NSN 6130-01-429-0880
NSN 5835-01-478-9428
NSN 6220-01-430-7021
NSN 6110-00-377-9160
NSN 5945-01-615-7223
NSN 5905-01-221-8069
NSN 6135-00-027-3914
NSN 5998-01-466-8865
NSN 6145-00-829-3919
NSN 6150-00-974-4784
NSN 5975-01-589-5329