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 5985-01-104-2294
NSN 6240-01-131-9244
NSN 5990-01-472-2447
NSN 5950-00-239-3328
NSN 5950-01-492-5919
NSN 6320-00-098-2858
NSN 5935-01-386-2754
NSN 6610-01-461-1644
NSN 5996-01-262-6023
NSN 5960-01-536-9763
NSN 5996-00-264-0710
NSN 5950-01-552-6952