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 6130-01-189-2773
NSN 6110-01-633-9660
NSN 5935-01-044-8820
NSN 6110-01-290-3418
NSN 5945-01-203-9002
NSN 6685-01-372-3393
NSN 6650-01-328-0546
NSN 6320-01-425-1417
NSN 5910-00-868-2521
NSN 5950-01-129-2342
NSN 5915-00-525-5753
NSN 6145-01-517-9575