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 5935-01-523-6208
NSN 6145-01-585-6780
NSN 5950-01-451-2617
NSN 6240-00-179-5043
NSN 5998-01-604-8945
NSN 5930-01-492-7568
NSN 5945-01-439-3331
NSN 6610-00-404-1287
NSN 6240-00-183-0570
NSN 5996-01-310-9564
NSN 5920-00-925-2639
NSN 6135-01-359-5798