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 5990-00-301-3386
NSN 5935-01-132-6096
NSN 2925-01-470-5534
NSN 5920-00-291-1379
NSN 5920-01-338-3489
NSN 6150-01-191-1733
NSN 5935-01-337-0107
NSN 5965-01-176-3227
NSN 6320-01-267-0586
NSN 5965-00-624-4134
NSN 4140-01-299-3357
NSN 5998-01-661-0946