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 7035-01-411-6062
NSN 5975-01-505-0389
NSN 5920-01-412-3613
NSN 6610-00-932-2465
NSN 5895-00-275-9145
NSN 5999-01-318-2678
NSN 5990-01-115-9488
NSN 6105-01-018-3510
NSN 5965-01-194-3453
NSN 5999-00-847-8030
NSN 5998-00-189-0350
NSN 6220-00-212-9098