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 5960-00-570-6986
NSN 5985-00-910-6617
NSN 6135-01-230-4399
NSN 5999-01-026-9445
NSN 6135-00-369-2368
NSN 6110-01-473-7438
NSN 6110-01-633-8045
NSN 6220-01-466-8702
NSN 2925-01-267-1598
NSN 6150-01-301-5885
NSN 6650-00-349-8732
NSN 6150-00-125-9572