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 5996-01-431-9335
NSN 5915-00-833-7714
NSN 5935-01-565-0800
NSN 5960-01-425-1454
NSN 5895-01-021-0390
NSN 6220-01-323-7897
NSN 5985-01-275-0846
NSN 5960-01-370-4285
NSN 5915-01-510-9763
NSN 6320-01-631-7828
NSN 5945-01-414-0324
NSN 5835-00-789-1454