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 5915-01-024-8200
NSN 5915-00-338-2556
NSN 6685-01-422-4241
NSN 6620-01-573-1952
NSN 5945-01-423-1009
NSN 5910-00-052-2027
NSN 5990-01-310-0884
NSN 6685-01-408-0860
NSN 5985-01-192-8998
NSN 5998-01-128-5892
NSN 5985-01-453-7171
NSN 5999-00-141-0291