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 6220-00-228-9003
NSN 6220-00-289-9915
NSN 5895-00-926-2633
NSN 5998-00-334-0386
NSN 5935-01-552-8827
NSN 5999-00-899-6579
NSN 6240-00-629-9810
NSN 6105-00-594-8642
NSN 6220-01-087-5115
NSN 6145-00-782-4420
NSN 5925-00-297-8821
NSN 6610-01-025-4718