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 4140-00-930-9299
NSN 2925-01-535-7235
NSN 5996-01-516-7208
NSN 5950-01-056-7687
NSN 5999-01-444-9675
NSN 5965-00-458-7321
NSN 5930-01-543-7966
NSN 6150-01-422-5709
NSN 5905-01-455-7159
NSN 5895-01-517-8929
NSN 6110-01-328-5258
NSN 5998-01-432-2889