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 6135-00-152-8729
NSN 6220-01-502-6568
NSN 7035-00-865-9105
NSN 5960-00-894-1190
NSN 5950-01-369-8400
NSN 6320-00-174-1362
NSN 5905-01-369-6093
NSN 5910-01-522-1333
NSN 6110-01-618-0068
NSN 5975-01-599-5191
NSN 5985-01-244-4070
NSN 6135-00-368-5578