See dwg. For add. Specs. Cxcy - lens inside red
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 5925-01-588-8339
NSN 6110-01-485-0276
NSN 6110-00-951-9824
NSN 6620-01-589-0460
NSN 5960-00-161-3728
NSN 4140-00-277-6285
NSN 5965-01-104-5102
NSN 5920-00-357-0260
NSN 5950-01-442-6188
NSN 5905-01-212-6994
NSN 5960-01-124-0182
NSN 5925-01-379-9942