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 5935-01-455-2079
NSN 6610-00-420-8475
NSN 5930-01-406-3203
NSN 6610-01-200-6861
NSN 7035-01-621-8691
NSN 6150-00-812-8145
NSN 6105-01-254-3626
NSN 5835-01-512-4834
NSN 6145-00-013-8655
NSN 5960-01-649-1341
NSN 6135-01-535-9092
NSN 6685-01-549-0907