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 6130-01-634-0603
NSN 5895-01-202-8097
NSN 5985-00-236-1139
NSN 6145-01-258-4738
NSN 5930-00-636-8888
NSN 5835-01-347-8714
NSN 6130-00-542-8078
NSN 5975-00-727-6099
NSN 6610-01-386-7542
NSN 5985-00-883-3308
NSN 6650-01-380-6909
NSN 5990-00-321-8459