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 7035-01-368-4801
NSN 6105-01-127-0659
NSN 6650-00-777-8225
NSN 5835-00-060-8436
NSN 5895-01-092-2547
NSN 2925-00-441-8252
NSN 5990-01-501-5409
NSN 4140-01-503-0034
NSN 5990-00-840-6571
NSN 5990-00-573-6067
NSN 5835-01-495-0595
NSN 2925-01-146-0278