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 5925-00-683-7877
NSN 4140-01-634-0330
NSN 5999-00-050-2607
NSN 5920-00-878-2753
NSN 5975-00-988-8689
NSN 6620-01-558-6558
NSN 6110-01-554-8653
NSN 5990-01-195-3693
NSN 6145-00-136-9132
NSN 5950-01-113-9065
NSN 6320-00-937-5625
NSN 5965-01-181-3140