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 5999-01-505-3706
NSN 6130-01-350-8457
NSN 5935-01-580-6502
NSN 2925-00-142-0641
NSN 6145-01-414-1493
NSN 6150-01-061-9467
NSN 5915-00-400-9981
NSN 6105-00-677-0593
NSN 5975-01-476-3975
NSN 6685-01-495-1007
NSN 5855-01-135-9664
NSN 5930-01-500-5735