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 5835-01-274-1035
NSN 6240-01-032-6598
NSN 5975-00-390-3893
NSN 6145-01-491-7530
NSN 5905-00-153-2134
NSN 6610-01-160-6585
NSN 6150-01-250-5699
NSN 6240-01-610-0789
NSN 5905-01-107-3165
NSN 5960-01-394-3846
NSN 6110-01-421-2714
NSN 5910-01-192-3739