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 6645-00-559-3623
NSN 6685-00-248-6990
NSN 5930-00-964-3350
NSN 2925-01-101-4655
NSN 5996-01-247-7671
NSN 5960-00-935-2340
NSN 5920-00-005-7106
NSN 5895-00-404-1163
NSN 5960-01-499-7172
NSN 4140-00-017-1495
NSN 6130-01-444-3909
NSN 5985-01-023-8011