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 6105-01-266-9085
NSN 4140-01-470-2599
NSN 5935-01-068-1621
NSN 6135-00-112-8637
NSN 5855-01-472-2234
NSN 6130-01-421-2705
NSN 7035-01-333-9298
NSN 5990-01-154-7296
NSN 5960-01-174-6975
NSN 6240-01-422-3461
NSN 6110-00-723-6341
NSN 5998-01-162-3333