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 5960-01-420-4744
NSN 6150-00-877-3954
NSN 5960-01-260-3973
NSN 5835-01-466-5496
NSN 6130-00-186-8460
NSN 5835-00-231-9544
NSN 5960-01-252-8821
NSN 6150-01-445-8970
NSN 5945-00-860-7977
NSN 5920-01-143-5002
NSN 5999-00-771-8686
NSN 5935-00-244-0935