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 6645-01-057-7987
NSN 6130-00-061-7486
NSN 5960-00-152-9488
NSN 5990-00-621-9755
NSN 4140-01-526-1066
NSN 5935-01-515-2036
NSN 5905-01-323-5836
NSN 5925-01-112-5405
NSN 6645-00-764-3355
NSN 5985-00-103-0449
NSN 6320-01-198-4024
NSN 5950-00-425-4155