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 5965-01-617-2243
NSN 5930-00-465-4064
NSN 5895-01-227-8423
NSN 7035-00-455-7666
NSN 7035-01-254-3044
NSN 6110-00-592-7474
NSN 5996-00-245-6273
NSN 5999-01-444-0561
NSN 5965-01-433-1974
NSN 6610-01-152-2821
NSN 5996-00-237-4259
NSN 6150-00-544-0587