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 5855-01-236-9645
NSN 6685-01-237-1373
NSN 5915-01-656-7057
NSN 5950-01-016-3718
NSN 6135-01-582-2589
NSN 6610-01-397-4607
NSN 5950-01-480-9164
NSN 5990-01-462-1617
NSN 5960-01-599-9821
NSN 5935-01-523-1411
NSN 5930-01-130-2388
NSN 5998-01-133-8572