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 5999-01-328-8692
NSN 6620-00-361-3590
NSN 5935-01-464-4519
NSN 5965-01-398-9579
NSN 5915-01-315-4802
NSN 5895-00-153-2595
NSN 5930-00-826-0782
NSN 5965-01-070-9265
NSN 5895-00-052-2752
NSN 5960-00-021-5618
NSN 7035-01-512-1826
NSN 5855-01-384-3314