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 5905-00-201-9336
NSN 4140-01-309-8006
NSN 6150-01-184-3233
NSN 5950-01-388-5950
NSN 5950-01-459-3008
NSN 6135-01-238-2878
NSN 5905-01-187-0630
NSN 7035-01-597-1449
NSN 5950-01-236-3361
NSN 5935-00-283-8322
NSN 4140-00-242-0902
NSN 5960-00-355-4017