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 6320-01-426-8947
NSN 6240-01-014-5598
NSN 5975-01-537-0133
NSN 6240-00-172-5866
NSN 6220-00-993-4580
NSN 5975-01-090-5174
NSN 6145-01-510-2069
NSN 6105-01-211-7854
NSN 5985-01-335-0388
NSN 6145-01-100-6360
NSN 5975-00-732-7911
NSN 4140-00-057-7298