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 6135-01-231-4809
NSN 5960-01-425-1454
NSN 5998-01-155-3987
NSN 6685-00-516-2173
NSN 6150-01-432-3591
NSN 5915-01-418-3639
NSN 6240-00-589-4515
NSN 5905-00-374-2248
NSN 6220-00-171-8638
NSN 6645-01-467-9983
NSN 6130-01-094-2037
NSN 6110-00-358-1870