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 6620-00-758-5233
NSN 5895-00-973-3852
NSN 5996-00-222-6049
NSN 5920-00-452-0963
NSN 6320-01-029-4220
NSN 5910-00-551-2442
NSN 6610-01-633-8931
NSN 5998-00-337-1115
NSN 5985-00-186-8755
NSN 5975-01-384-4826
NSN 6130-01-370-4567
NSN 6320-00-343-1798