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 6145-00-615-2019
NSN 6610-01-525-8235
NSN 5950-01-442-6188
NSN 6145-00-246-2424
NSN 7035-01-325-0536
NSN 4140-01-194-4101
NSN 5915-01-394-1694
NSN 6110-01-459-3465
NSN 6650-01-220-3842
NSN 5925-01-088-0654
NSN 5935-01-190-3223
NSN 6240-00-289-7059