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 6105-01-486-2079
NSN 5835-00-177-2970
NSN 6105-00-936-2130
NSN 5925-00-875-1296
NSN 5930-01-232-4457
NSN 5935-01-341-9687
NSN 6105-01-077-0633
NSN 6110-00-376-4834
NSN 6130-01-362-0254
NSN 5895-01-225-0609
NSN 5910-01-424-3201
NSN 6240-01-526-1674