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 5950-01-276-3708
NSN 5925-00-827-4964
NSN 5905-01-592-7406
NSN 6150-00-042-7710
NSN 5935-00-840-6436
NSN 5910-01-654-4002
NSN 5895-01-060-2527
NSN 5855-01-364-9810
NSN 6110-01-189-8223
NSN 5996-01-285-2353
NSN 5998-00-773-5175
NSN 6135-01-466-3980