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 5998-00-148-9718
NSN 5935-01-049-5972
NSN 6685-01-469-3025
NSN 6610-00-823-9159
NSN 6685-01-521-2672
NSN 5930-01-574-0355
NSN 5915-01-408-8824
NSN 5920-00-189-0858
NSN 5990-00-767-0893
NSN 5950-01-587-2427
NSN 5945-00-136-2507
NSN 4140-01-382-9517