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 5985-01-387-5248
NSN 5905-00-082-0533
NSN 6105-01-368-3283
NSN 6105-00-888-9977
NSN 4140-01-441-7003
NSN 5985-01-078-6821
NSN 6150-01-310-7840
NSN 2925-01-115-0306
NSN 6150-00-808-1134
NSN 6105-00-236-6374
NSN 5895-01-488-7879
NSN 5835-00-350-3703