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 5935-01-043-3161
NSN 5975-00-986-6186
NSN 5950-01-305-8642
NSN 5975-01-538-4349
NSN 5930-01-123-8239
NSN 6150-00-808-1134
NSN 5920-00-066-2699
NSN 5985-01-532-4293
NSN 6150-01-250-8776
NSN 5910-00-972-5462
NSN 7035-00-163-6221
NSN 6110-01-100-6816