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 6220-01-437-8467
NSN 5950-00-346-8026
NSN 5996-01-206-4104
NSN 5999-00-230-9304
NSN 5996-01-571-9384
NSN 5925-01-210-6421
NSN 5935-00-179-4942
NSN 5999-01-647-1563
NSN 5999-01-298-6763
NSN 5905-01-444-4427
NSN 6610-01-069-1156
NSN 5999-01-161-8217