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 6650-00-361-8222
NSN 5998-01-474-2492
NSN 5915-01-642-0016
NSN 5935-01-518-9724
NSN 7035-01-495-7134
NSN 6105-00-972-8061
NSN 5950-01-237-3406
NSN 6620-01-230-8064
NSN 6130-01-634-0603
NSN 5935-00-753-5101
NSN 5965-01-098-7028
NSN 5965-00-508-1238