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 2925-01-443-4216
NSN 5990-00-416-9296
NSN 5990-00-464-6385
NSN 4140-01-075-3023
NSN 5835-01-015-0845
NSN 5999-01-296-2274
NSN 6145-01-450-9855
NSN 6130-01-469-1245
NSN 5895-01-083-6761
NSN 5950-01-367-2643
NSN 5990-00-296-4825
NSN 5910-00-093-3474