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 7035-01-483-7824
NSN 6220-01-581-2162
NSN 6145-01-548-8854
NSN 5985-01-095-3849
NSN 6145-01-507-4157
NSN 5920-01-040-0425
NSN 6650-01-399-8552
NSN 5996-00-018-3802
NSN 5950-00-734-1457
NSN 5835-00-356-3825
NSN 6130-01-634-0603
NSN 2925-00-936-9344