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 6130-00-469-4604
NSN 5910-01-233-0493
NSN 5996-01-197-7005
NSN 4140-00-073-2239
NSN 5996-01-196-4502
NSN 5895-00-480-5892
NSN 7035-01-237-8653
NSN 6650-01-364-1313
NSN 6320-00-139-1090
NSN 6220-01-348-8243
NSN 5935-01-462-7528
NSN 5990-01-380-7815