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 5855-01-526-9352
NSN 5965-01-215-3184
NSN 5965-00-554-4138
NSN 6320-01-335-8336
NSN 5905-00-618-9091
NSN 6105-01-070-8022
NSN 2925-00-491-3549
NSN 5835-01-618-1225
NSN 6110-01-083-8317
NSN 5999-01-265-5495
NSN 7035-01-129-7834
NSN 6145-01-257-6630