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 5905-01-121-0318
NSN 5920-01-437-6543
NSN 5920-01-542-4613
NSN 5920-00-826-9035
NSN 5996-00-340-5634
NSN 5895-01-287-8306
NSN 6135-00-708-0892
NSN 6130-01-372-4540
NSN 5950-01-198-9152
NSN 5920-01-267-6086
NSN 5999-00-450-3188
NSN 5999-00-862-0184