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: Other parts of airplanes or helicopters for use in military aircraft (excludes propellers, rotors, undercarriages, and parts thereof)
NSN 5975-01-625-9420
NSN 6110-00-347-7290
NSN 6145-01-347-8464
NSN 6130-01-104-4371
NSN 6130-01-415-1423
NSN 6220-01-382-2696
NSN 4140-00-274-9638
NSN 6240-01-558-4104
NSN 6685-01-071-3774
NSN 6105-01-381-7242
NSN 5975-01-600-1179
NSN 5990-01-369-2764