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 5835-01-453-3074
NSN 7035-00-215-3272
NSN 2925-01-199-7394
NSN 5935-00-035-4559
NSN 5950-01-531-5525
NSN 5990-01-281-3120
NSN 6220-01-164-1745
NSN 7035-01-369-1445
NSN 5998-01-426-8989
NSN 5925-01-113-8272
NSN 7035-00-155-9513
NSN 6650-00-313-4172