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 5950-00-037-9334
NSN 6110-01-612-8593
NSN 5996-00-111-3379
NSN 6645-01-579-6304
NSN 5960-00-958-9146
NSN 5905-00-836-0738
NSN 5915-01-119-4090
NSN 5915-00-499-2173
NSN 5945-01-498-8333
NSN 5985-01-429-8844
NSN 6320-01-229-6479
NSN 5905-01-453-6931