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 5905-01-386-4483
NSN 2925-00-845-1480
NSN 5960-01-319-0276
NSN 6130-01-422-1151
NSN 5935-01-398-0281
NSN 6145-00-245-6645
NSN 6320-00-823-2015
NSN 6145-01-398-8811
NSN 6105-01-566-1293
NSN 5985-01-443-3287
NSN 5925-01-510-0009
NSN 5895-01-295-1920