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 5915-01-364-4882
NSN 5855-00-896-4047
NSN 5935-01-473-5273
NSN 5975-01-246-7137
NSN 5835-01-171-9126
NSN 5975-01-506-8850
NSN 2925-00-480-9068
NSN 6620-01-582-2046
NSN 6650-00-809-1817
NSN 5965-00-006-3104
NSN 6110-00-858-1948
NSN 5960-01-008-5670