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 5915-00-761-3496
NSN 5965-01-194-3453
NSN 5945-01-290-3880
NSN 5935-00-804-2763
NSN 5835-01-501-0526
NSN 5935-01-508-0852
NSN 6685-01-124-8899
NSN 5935-01-246-4587
NSN 6110-00-904-8925
NSN 5920-01-546-9014
NSN 5999-01-610-5787
NSN 5996-01-488-8420