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 6110-01-633-9660
NSN 5965-00-764-1841
NSN 5945-01-118-3869
NSN 6650-00-726-4242
NSN 6105-00-252-9017
NSN 5985-00-532-3710
NSN 5950-01-425-1174
NSN 5920-01-076-9774
NSN 5990-01-492-6575
NSN 6240-00-655-2523
NSN 5925-01-247-4026
NSN 6620-01-437-8193