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 5985-00-084-4125
NSN 6145-01-392-1146
NSN 5996-01-055-5993
NSN 6110-01-181-4520
NSN 6145-01-303-4821
NSN 5920-01-024-0592
NSN 5915-00-135-5995
NSN 6240-00-798-1810
NSN 5998-00-267-1044
NSN 5930-01-574-3985
NSN 5915-01-166-7999
NSN 6610-01-212-9817