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 5975-00-269-8391
NSN 6610-01-362-8686
NSN 6620-01-253-0374
NSN 6240-01-550-3112
NSN 5960-00-454-6402
NSN 6145-01-399-5148
NSN 5935-01-325-5716
NSN 7035-01-442-3987
NSN 5905-01-431-5721
NSN 5996-01-044-6241
NSN 6240-00-956-6424
NSN 6320-00-238-9973