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 6620-00-286-5721
NSN 5895-00-148-8386
NSN 5855-01-634-0259
NSN 5925-01-301-4392
NSN 6105-00-527-7702
NSN 6645-01-274-3384
NSN 5930-00-220-2283
NSN 5985-00-081-9142
NSN 5999-00-341-7637
NSN 6145-01-167-8366
NSN 6135-01-375-6724
NSN 5855-01-654-0761