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 5999-01-267-2858
NSN 5998-01-540-6717
NSN 5945-00-229-8331
NSN 5990-00-837-7240
NSN 5905-00-142-0994
NSN 5975-01-212-4306
NSN 7035-00-442-1869
NSN 6105-01-105-9077
NSN 5998-01-193-3353
NSN 5925-00-227-8557
NSN 5855-00-197-6387
NSN 5905-00-293-8294