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 6240-01-327-4945
NSN 5996-00-081-8057
NSN 5999-00-921-1174
NSN 5945-01-235-6550
NSN 5935-01-296-8801
NSN 6130-00-528-1266
NSN 6320-01-021-6633
NSN 6110-00-269-2696
NSN 5950-01-274-5761
NSN 4140-00-753-9204
NSN 5855-01-459-1151
NSN 5996-01-341-4313