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 6645-01-423-9361
NSN 5930-00-235-5674
NSN 5895-00-269-3848
NSN 5965-00-328-6884
NSN 5999-00-905-6936
NSN 6135-01-205-5965
NSN 5975-01-134-2271
NSN 5960-01-431-4291
NSN 5999-01-647-6316
NSN 5835-01-111-9838
NSN 5999-00-976-6879
NSN 6105-00-132-5162