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 6620-01-625-2855
NSN 5945-01-367-6469
NSN 6150-00-301-0758
NSN 5930-01-050-8025
NSN 6145-01-134-7598
NSN 5945-01-185-9868
NSN 5925-01-415-0261
NSN 5930-01-556-8045
NSN 5998-00-131-2760
NSN 5999-01-217-1547
NSN 6145-00-539-9799
NSN 5999-01-300-6012