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 7035-01-019-3951
NSN 5950-00-925-6708
NSN 5910-01-227-1939
NSN 5935-01-248-7709
NSN 2925-00-055-9601
NSN 6105-01-431-6723
NSN 5996-00-245-6273
NSN 5965-01-343-6983
NSN 5945-01-296-9154
NSN 6150-01-634-0575
NSN 6240-00-280-8502
NSN 6220-01-533-1302