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 5835-00-386-4966
NSN 6145-01-185-7390
NSN 2925-00-233-5644
NSN 5920-01-448-9208
NSN 6145-01-352-5925
NSN 6150-00-858-5116
NSN 5996-01-147-6054
NSN 6610-00-797-1417
NSN 6145-01-032-3693
NSN 5835-00-890-3932
NSN 5910-01-290-3769
NSN 6220-01-630-2010