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 5855-01-195-2518
NSN 6150-00-488-6926
NSN 5990-01-257-2476
NSN 5945-01-476-7182
NSN 6130-01-005-2205
NSN 5895-01-511-6534
NSN 4140-01-302-9015
NSN 5925-01-332-1035
NSN 7035-00-470-4977
NSN 6105-00-470-0441
NSN 5930-01-010-8403
NSN 5945-00-282-3181