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 5965-00-408-5501
NSN 5960-00-371-6963
NSN 6240-00-698-5822
NSN 5950-01-543-9019
NSN 6110-01-633-8045
NSN 5920-01-256-5830
NSN 7035-01-476-4085
NSN 5935-01-460-8050
NSN 6145-00-880-3365
NSN 5925-00-529-0441
NSN 6220-00-468-0296
NSN 6150-01-146-1235