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.
Classification: Insulation products of glass fibers
NSN 5920-00-283-1321
NSN 6645-00-385-3684
NSN 5950-01-067-6691
NSN 5905-01-091-3891
NSN 5998-01-476-9568
NSN 6135-00-840-6451
NSN 6685-01-565-9049
NSN 5990-00-715-1496
NSN 5920-01-487-4146
NSN 5999-01-099-9782
NSN 6650-01-505-3637
NSN 5930-00-111-2727