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 6105-00-144-1754
NSN 5925-01-197-2586
NSN 5985-00-252-3496
NSN 6130-00-308-2768
NSN 5920-00-925-6661
NSN 6610-00-273-9019
NSN 6105-01-435-4376
NSN 5935-01-512-0647
NSN 6610-01-141-4960
NSN 6240-01-194-2206
NSN 5950-00-031-0033
NSN 5985-01-540-4944