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 6220-01-234-2502
NSN 6620-01-008-1654
NSN 5990-00-444-9993
NSN 5975-00-109-9525
NSN 6105-01-398-1932
NSN 5985-01-358-6042
NSN 2925-00-132-1280
NSN 5935-01-278-3457
NSN 5905-01-145-6331
NSN 5895-01-294-6867
NSN 5895-01-093-6980
NSN 6150-00-947-5064