A transparent item of a predetermined size that permits unobstructed and undistorted view of a desired area. It may include a frame, have reference markings, grid lines and may be heat strengthened and/or tinted. It is generally used where safety, security, and/or the restriction of foreign matter are required, such as the visual examination of the inside of pressurized tanks, liquid sights, controlled liquid flow, and inspection of equipment enclosed in a housing. See window (as modified); scale, cathode ray tube; scale, plotting; window, metal; window, wood; and window panel, aircraft.
Classification: Articles of plastics & articles of other materials of heading 3901 to 3914, nesoi
NSN 6610-00-973-2453
NSN 5965-01-399-7851
NSN 5945-01-003-8106
NSN 2925-00-088-6790
NSN 6110-00-603-3322
NSN 5835-01-502-9228
NSN 6650-01-529-6416
NSN 5905-00-278-5764
NSN 6110-01-395-3421
NSN 6150-01-505-1167
NSN 5895-01-453-2659
NSN 6220-00-488-8872