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 5855-00-150-1820
NSN 5960-01-046-8308
NSN 2925-01-330-2988
NSN 2925-01-535-7235
NSN 6240-01-624-1777
NSN 7035-01-232-7263
NSN 6650-01-396-5352
NSN 5999-01-367-0496
NSN 5915-00-228-0114
NSN 5950-01-489-1164
NSN 6110-00-394-7187
NSN 5925-01-454-4419