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 6105-00-351-8009
NSN 5960-01-205-6629
NSN 5985-01-386-4159
NSN 5905-00-389-6252
NSN 5965-01-537-0023
NSN 5965-01-189-4805
NSN 5960-00-958-7792
NSN 7035-00-513-9764
NSN 7035-01-106-3476
NSN 5855-01-062-5655
NSN 6130-01-113-7566
NSN 7035-00-215-3272