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 5998-00-049-3472
NSN 5905-01-362-1434
NSN 5985-00-597-2966
NSN 5975-01-088-6116
NSN 5855-01-114-3513
NSN 5985-01-152-1820
NSN 5965-01-415-2898
NSN 7035-01-151-0265
NSN 5990-00-369-5212
NSN 6240-01-136-4694
NSN 5915-01-426-8862
NSN 6145-01-502-9751