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 5905-01-303-6236
NSN 5965-01-099-2989
NSN 5930-00-580-3085
NSN 7035-01-359-6108
NSN 5895-01-422-3136
NSN 5835-01-368-4015
NSN 5999-00-103-7724
NSN 5930-01-170-0931
NSN 7035-00-096-9986
NSN 5920-01-089-7903
NSN 5895-01-021-3598
NSN 7035-00-104-7613