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 5996-01-541-8989
NSN 5960-00-289-6591
NSN 5965-01-109-2917
NSN 5835-01-386-4027
NSN 6650-00-104-5368
NSN 6320-00-894-1644
NSN 6220-01-580-0604
NSN 5895-01-519-2662
NSN 5835-01-502-9228
NSN 6645-01-510-4815
NSN 5990-01-548-3711
NSN 5996-01-314-6479