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 5920-01-200-4639
NSN 6610-01-148-6474
NSN 5920-01-526-7220
NSN 6145-00-937-8895
NSN 5835-01-054-6418
NSN 5998-01-429-8340
NSN 5835-00-632-8621
NSN 6645-01-259-7142
NSN 6645-01-376-2336
NSN 5975-01-554-3158
NSN 5945-00-305-5670
NSN 5925-01-097-7046