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: Pressed or molded glass articles, wired or not, for building or construction;leaded glass windows etc; formed multicellular or foam glass
NSN 6110-00-083-8901
NSN 6220-01-365-1847
NSN 5975-00-296-5040
NSN 6110-00-770-2625
NSN 5915-00-269-4463
NSN 5960-01-071-6267
NSN 6105-01-044-5907
NSN 5855-01-422-6776
NSN 6240-00-239-8295
NSN 6650-01-358-2827
NSN 6320-01-380-0561
NSN 5915-00-716-1821