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 6650-01-447-7962
NSN 5930-01-446-7526
NSN 5930-01-414-5241
NSN 5910-01-044-5886
NSN 5905-01-447-2806
NSN 5950-00-808-1530
NSN 5855-01-500-2531
NSN 5935-01-487-7899
NSN 5925-01-017-1036
NSN 6610-01-368-0465
NSN 6105-01-624-9902
NSN 5996-01-032-3904