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 5998-01-465-4693
NSN 5950-01-429-8186
NSN 5960-01-495-0859
NSN 6105-00-022-3333
NSN 5996-00-145-8174
NSN 5965-00-682-3567
NSN 6240-01-643-8766
NSN 5920-00-140-8912
NSN 5950-01-151-7928
NSN 5998-01-627-7347
NSN 5950-01-111-8481
NSN 6130-00-420-1248