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 6145-00-126-1606
NSN 5965-01-622-8875
NSN 5998-01-243-8662
NSN 5998-01-450-5719
NSN 5895-00-233-5901
NSN 5975-01-646-6584
NSN 5950-01-112-2358
NSN 6240-00-258-2389
NSN 5835-01-008-8887
NSN 6110-00-950-6065
NSN 5935-01-319-4129
NSN 6150-00-789-7347