One 0.192 in. Notch on edge
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 6620-00-542-1579
NSN 5905-01-182-9101
NSN 5985-00-704-9268
NSN 5905-01-057-8085
NSN 4140-01-061-2431
NSN 6130-01-042-4949
NSN 5996-01-437-1186
NSN 7035-00-445-9657
NSN 5999-00-171-8858
NSN 5975-01-359-2679
NSN 5920-01-537-0684
NSN 5835-01-426-6573