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 5996-00-431-3848
NSN 5999-00-469-3460
NSN 5960-01-069-2009
NSN 5965-00-946-6692
NSN 7035-01-150-9018
NSN 6130-00-516-9343
NSN 6240-01-442-7746
NSN 5895-01-472-5879
NSN 5835-01-130-6503
NSN 6220-01-661-2401
NSN 6150-01-168-8290
NSN 6130-00-137-3966