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 5990-01-286-0601
NSN 5895-01-152-1947
NSN 2925-01-322-9780
NSN 5998-00-081-1454
NSN 4140-01-091-0270
NSN 6685-01-152-2846
NSN 5925-01-578-6869
NSN 6620-01-338-6073
NSN 5905-01-196-6154
NSN 6135-01-414-8831
NSN 5945-00-815-3511
NSN 5999-01-429-7018