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 2925-01-493-3245
NSN 6620-01-286-6769
NSN 4140-01-314-8251
NSN 5996-00-371-8252
NSN 6240-00-125-6559
NSN 6620-00-456-0404
NSN 5905-01-419-4840
NSN 5999-01-037-0074
NSN 5975-00-552-1764
NSN 6650-01-141-1582
NSN 5950-01-258-8267
NSN 6130-01-315-5260