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 6105-01-046-3609
NSN 5950-00-111-6210
NSN 6150-00-469-4301
NSN 5920-01-507-2780
NSN 5965-01-005-0341
NSN 5996-01-512-7678
NSN 5960-00-054-3946
NSN 2925-01-545-2717
NSN 7035-01-343-6010
NSN 6650-01-424-1545
NSN 5910-01-181-9716
NSN 6610-00-996-2566