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 5996-01-611-7204
NSN 5965-01-569-6704
NSN 2925-01-116-6838
NSN 6150-01-547-5044
NSN 6110-01-194-7344
NSN 5965-00-168-9624
NSN 5950-01-657-2796
NSN 5950-01-422-7465
NSN 5960-00-699-8146
NSN 6145-00-798-4831
NSN 5915-01-352-1274
NSN 6650-00-231-7843