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 5985-01-371-3067
NSN 5999-01-134-3038
NSN 5990-01-235-8404
NSN 5935-00-538-0414
NSN 5965-01-232-6509
NSN 5895-01-085-6168
NSN 6130-01-523-0463
NSN 6650-00-113-7698
NSN 6685-00-218-1229
NSN 5999-00-887-9966
NSN 6610-00-395-2574
NSN 6150-01-480-9795