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 5998-00-321-8486
NSN 5920-01-169-4560
NSN 6240-01-279-3410
NSN 6130-01-438-4385
NSN 6105-01-014-6104
NSN 5990-00-621-0572
NSN 5998-01-339-7554
NSN 5855-00-466-2309
NSN 6650-00-389-4111
NSN 5985-00-558-0662
NSN 6320-01-319-3584
NSN 5960-00-371-6963