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 5915-00-579-0618
NSN 6320-00-004-9158
NSN 6135-01-204-8712
NSN 6645-00-800-5485
NSN 6135-00-078-9931
NSN 6610-01-416-8384
NSN 5998-01-218-3112
NSN 5935-01-225-0628
NSN 5999-01-655-0417
NSN 5975-01-048-7729
NSN 5855-01-486-9924
NSN 6150-00-856-6995