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 6145-01-592-8842
NSN 7035-01-644-5251
NSN 6650-01-178-5644
NSN 5950-01-050-4597
NSN 5930-01-150-1785
NSN 6135-00-100-8890
NSN 6685-01-632-0569
NSN 2925-01-320-6512
NSN 6135-01-592-4139
NSN 5915-01-501-5895
NSN 7035-00-235-3529
NSN 5915-01-291-3525