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 5945-01-215-9293
NSN 6650-01-360-6577
NSN 5855-00-256-5562
NSN 5915-00-960-4786
NSN 6135-01-524-7621
NSN 5905-00-343-6735
NSN 6150-01-256-4075
NSN 5950-00-252-2660
NSN 4140-01-447-3141
NSN 5895-01-434-9006
NSN 5835-00-649-9402
NSN 6320-00-481-7291