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 6320-01-054-3046
NSN 5915-01-139-5014
NSN 2925-01-043-9786
NSN 6610-01-027-1641
NSN 6110-01-447-2770
NSN 5990-01-354-8965
NSN 6110-01-417-1811
NSN 5905-01-315-6322
NSN 5999-00-390-5974
NSN 5985-00-179-4449
NSN 5998-01-501-4879
NSN 5915-01-095-9833