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 5930-00-038-6148
NSN 6145-01-173-1201
NSN 5945-00-286-8594
NSN 6650-00-767-0787
NSN 6150-00-269-5017
NSN 5835-01-463-2334
NSN 6110-01-463-9735
NSN 5930-00-991-7253
NSN 5945-01-373-1554
NSN 5835-01-090-0784
NSN 6110-00-394-7187
NSN 7035-01-580-8525