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 6610-01-502-8868
NSN 5998-00-077-4441
NSN 2925-01-324-6423
NSN 5998-01-444-3449
NSN 6110-01-354-7515
NSN 5910-01-519-3731
NSN 5998-00-161-2810
NSN 6650-01-415-6682
NSN 6135-01-205-5965
NSN 6685-01-175-2083
NSN 5910-01-519-2308
NSN 5945-01-446-4534