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 6105-01-208-1725
NSN 5930-01-332-6674
NSN 6650-01-096-6803
NSN 6220-00-704-9823
NSN 5925-01-327-2731
NSN 5990-00-925-6614
NSN 5925-01-217-1644
NSN 5925-01-198-9910
NSN 6320-01-462-2295
NSN 2925-01-633-4048
NSN 6645-00-240-9762
NSN 6105-01-445-3655