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 5950-00-883-9438
NSN 5965-00-503-7572
NSN 2925-00-126-2879
NSN 5996-01-505-4665
NSN 5950-01-016-6942
NSN 5920-01-314-1429
NSN 5965-01-530-5781
NSN 6650-01-642-7911
NSN 6645-01-358-4907
NSN 5915-00-092-5599
NSN 5945-01-181-2176
NSN 6110-00-242-4065