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 5910-01-508-3605
NSN 5915-01-323-8596
NSN 6220-00-366-1670
NSN 6105-00-035-8809
NSN 5855-01-490-0745
NSN 5935-01-053-6654
NSN 5945-01-510-9223
NSN 5925-01-176-8415
NSN 5895-00-218-1355
NSN 5965-00-249-6980
NSN 6135-00-683-0536
NSN 6105-00-905-7225