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 5999-01-043-4004
NSN 6650-01-464-3545
NSN 5985-00-868-4890
NSN 5999-01-092-2064
NSN 5998-00-140-8301
NSN 6320-00-343-1798
NSN 5960-01-219-0524
NSN 7035-01-421-4446
NSN 6135-01-119-0720
NSN 5895-00-226-6901
NSN 5950-00-732-0534
NSN 5905-01-431-6863