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 5996-01-613-1207
NSN 6105-00-834-9090
NSN 5975-01-215-1205
NSN 5985-00-297-7526
NSN 5910-01-420-0965
NSN 5915-01-599-1870
NSN 6240-01-651-2850
NSN 5905-01-202-9237
NSN 5999-01-158-2897
NSN 5905-01-560-2398
NSN 6110-01-142-8624
NSN 5935-01-278-8532