12.875"x18"x.250"-mil-g-2857
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 2925-00-866-2757
NSN 5985-01-065-8133
NSN 5910-01-656-9473
NSN 5985-01-571-5218
NSN 5985-01-029-3648
NSN 5915-01-212-2822
NSN 5915-01-502-6623
NSN 5990-00-770-6975
NSN 5945-00-806-3020
NSN 5960-01-298-4143
NSN 5920-01-607-4346
NSN 6135-01-422-1440