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 6150-00-084-6287
NSN 6150-01-207-0065
NSN 5960-00-578-8008
NSN 2925-01-394-9658
NSN 6130-01-156-0436
NSN 6620-00-912-0255
NSN 5990-00-474-5609
NSN 5950-01-092-5591
NSN 5999-01-028-2076
NSN 5910-01-580-5233
NSN 5905-01-590-1639
NSN 4140-01-304-7563