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 6130-01-502-6991
NSN 5965-00-182-7928
NSN 5998-01-574-8229
NSN 5915-01-297-0818
NSN 6105-01-102-6643
NSN 6650-01-020-6148
NSN 5960-01-241-1844
NSN 5996-01-177-8923
NSN 5998-01-545-0865
NSN 6240-00-966-3831
NSN 5996-01-061-4041
NSN 5965-01-367-6483