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 6610-01-426-5090
NSN 5965-01-060-2558
NSN 5910-00-204-9571
NSN 5935-01-005-2068
NSN 6645-01-654-5293
NSN 5895-01-044-6369
NSN 5965-00-486-7907
NSN 6645-01-169-3978
NSN 6145-01-430-4697
NSN 2925-01-484-8556
NSN 6620-01-142-0084
NSN 5915-01-209-0599