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 6135-00-826-4798
NSN 5920-01-215-4741
NSN 6105-01-319-0144
NSN 6320-00-977-3930
NSN 5960-01-487-6436
NSN 6610-01-453-1610
NSN 5945-01-260-2539
NSN 5855-01-306-5655
NSN 5999-00-472-9710
NSN 5925-00-688-4332
NSN 7035-01-413-2018
NSN 6150-01-132-0001