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 6320-01-046-5228
NSN 5925-01-228-7394
NSN 5990-01-029-0868
NSN 6610-00-731-3800
NSN 6645-00-467-6094
NSN 6240-00-295-2158
NSN 5950-00-184-8271
NSN 5950-01-513-9995
NSN 5855-00-055-1579
NSN 6320-01-652-3806
NSN 5996-01-109-1586
NSN 6145-00-174-9344