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 6130-00-841-8917
NSN 5910-01-044-5221
NSN 6645-01-463-3441
NSN 6685-01-314-1785
NSN 6105-01-643-6024
NSN 5945-00-265-1762
NSN 5855-01-468-9822
NSN 5935-00-025-8025
NSN 5925-00-192-9630
NSN 5895-01-004-3122
NSN 5950-01-074-8774
NSN 6620-01-446-6977