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 5855-00-165-3093
NSN 5975-01-251-1080
NSN 5975-00-845-6224
NSN 6110-01-390-6748
NSN 6320-01-180-9908
NSN 6320-01-448-1189
NSN 6110-01-443-1726
NSN 6240-01-407-0596
NSN 6110-01-003-9614
NSN 6320-01-573-6490
NSN 5835-01-616-6131
NSN 5930-01-442-7705