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 5925-01-559-2487
NSN 6610-01-525-4389
NSN 5985-01-362-1290
NSN 6610-01-579-2984
NSN 5998-00-054-4868
NSN 6620-01-361-7595
NSN 6150-00-444-5109
NSN 6320-00-731-6134
NSN 5975-01-546-7628
NSN 6240-01-394-4212
NSN 6220-01-044-6940
NSN 5920-01-088-8312