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 6110-00-257-1446
NSN 5950-01-281-6996
NSN 5950-00-247-8897
NSN 5855-01-605-9627
NSN 6130-01-343-4078
NSN 7035-01-255-0334
NSN 5910-01-394-5816
NSN 6110-01-153-1000
NSN 6320-01-569-2672
NSN 4140-01-204-7025
NSN 5910-00-140-7731
NSN 5999-00-186-9314