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 6610-00-709-1692
NSN 5930-01-126-3110
NSN 6610-00-958-0294
NSN 5985-01-006-5084
NSN 6130-01-484-2162
NSN 5835-01-155-0786
NSN 6145-00-181-9608
NSN 5895-00-197-7188
NSN 5930-00-465-3638
NSN 6135-01-369-5392
NSN 7035-01-157-0028
NSN 6610-01-062-9994