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 5999-01-104-4057
NSN 2925-00-137-1209
NSN 6130-01-577-8887
NSN 5895-01-387-0972
NSN 6650-01-546-3605
NSN 5835-01-192-4165
NSN 6220-01-076-4383
NSN 5910-01-196-6924
NSN 5930-00-874-9523
NSN 6130-00-017-4938
NSN 5835-00-723-2505
NSN 5930-00-306-1034