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 6135-00-276-7625
NSN 6610-01-555-6654
NSN 5835-00-901-4932
NSN 6620-01-448-1423
NSN 5965-01-101-2187
NSN 5999-01-246-4247
NSN 5985-01-446-5950
NSN 7035-01-045-7202
NSN 6135-01-546-4588
NSN 5930-00-753-6806
NSN 5855-00-135-9064
NSN 2925-01-385-6661