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 6220-01-297-3218
NSN 4140-01-152-9161
NSN 5835-01-274-1035
NSN 6135-00-921-6487
NSN 5835-01-535-0948
NSN 6130-01-550-2757
NSN 6240-01-599-9668
NSN 5945-00-495-5681
NSN 5930-00-766-7794
NSN 5855-01-497-0467
NSN 6130-01-512-5497
NSN 5998-01-167-4582