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 2925-01-347-4208
NSN 7035-00-076-4097
NSN 7035-01-186-0024
NSN 5950-00-337-6360
NSN 6135-00-900-2139
NSN 5855-00-114-4954
NSN 6110-01-064-8155
NSN 6110-01-450-2792
NSN 6130-00-480-4461
NSN 5920-01-104-6198
NSN 5985-01-634-0635
NSN 5930-00-064-7720