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 5960-01-313-0212
NSN 5855-00-014-5008
NSN 6320-01-198-4024
NSN 7035-00-679-9027
NSN 5998-01-581-6073
NSN 5975-00-225-1881
NSN 4140-00-446-1024
NSN 5855-01-295-2313
NSN 6150-00-421-8774
NSN 5935-00-481-4265
NSN 5990-01-110-8979
NSN 2925-01-169-6196