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 6645-01-144-8627
NSN 5990-00-942-8296
NSN 6320-00-779-5923
NSN 2925-01-038-5770
NSN 6105-01-642-5645
NSN 6685-01-508-1209
NSN 5985-01-442-8742
NSN 6685-00-318-7766
NSN 5960-01-469-2006
NSN 5905-01-429-0102
NSN 5975-01-013-5864
NSN 5996-00-389-7404