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 6135-00-823-3034
NSN 6320-00-343-1798
NSN 5925-01-491-0509
NSN 5996-01-576-9852
NSN 5999-00-028-6947
NSN 6145-00-959-5897
NSN 5996-01-225-8507
NSN 5920-01-188-8445
NSN 6145-00-823-6215
NSN 5985-01-475-8711
NSN 5965-01-633-8849
NSN 6150-01-473-7581