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 6145-00-726-0637
NSN 6220-01-423-7306
NSN 5920-01-287-8409
NSN 5985-01-224-1871
NSN 5999-01-145-4274
NSN 5999-01-564-0598
NSN 5950-00-573-8495
NSN 6650-01-585-1716
NSN 5905-00-528-9046
NSN 5925-01-446-5267
NSN 5895-01-478-8215
NSN 6220-01-153-1937