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 5999-00-259-9965
NSN 6240-01-534-5829
NSN 5945-00-945-7535
NSN 6610-01-555-8791
NSN 6145-01-594-2389
NSN 7035-01-397-0068
NSN 6110-01-552-2373
NSN 6645-01-192-3061
NSN 6610-01-630-2498
NSN 7035-01-071-0197
NSN 5950-00-221-5235
NSN 7035-00-941-4949