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 5950-01-064-6028
NSN 6105-00-819-6575
NSN 5975-00-633-8532
NSN 5925-00-893-1425
NSN 5905-01-593-6444
NSN 5855-01-381-6052
NSN 5935-01-277-0354
NSN 6620-01-478-4299
NSN 5996-00-278-5193
NSN 6610-00-200-8832
NSN 5935-01-513-8861
NSN 6130-01-065-7057