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 5920-01-618-9362
NSN 2925-00-063-5898
NSN 5910-01-025-9820
NSN 5925-00-708-8769
NSN 5895-01-599-5338
NSN 6150-01-061-2754
NSN 6135-01-220-7193
NSN 6240-00-893-4799
NSN 5999-00-081-8621
NSN 5945-00-251-7812
NSN 5996-01-269-0685
NSN 6620-00-740-3699