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 5975-01-406-3395
NSN 5905-00-904-1818
NSN 6320-01-304-3639
NSN 6145-00-905-5590
NSN 5990-01-147-4811
NSN 6150-01-462-6822
NSN 6150-00-125-0453
NSN 6320-00-731-6134
NSN 6320-00-194-4252
NSN 5925-01-445-2424
NSN 6220-01-605-1346
NSN 5990-01-529-6347