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 5985-00-721-4303
NSN 5915-00-888-4379
NSN 6610-01-507-1956
NSN 6320-01-433-3953
NSN 5965-00-217-2476
NSN 5999-01-261-0907
NSN 5895-00-777-7057
NSN 6220-01-543-9303
NSN 6685-00-203-4485
NSN 6145-00-625-0714
NSN 6220-01-141-8200
NSN 5985-01-151-4817