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 5855-01-063-6340
NSN 5925-00-405-3363
NSN 5998-01-447-7142
NSN 6620-00-193-9503
NSN 5990-00-078-3182
NSN 6220-01-586-0234
NSN 5985-01-496-7484
NSN 5935-00-446-8811
NSN 6685-01-540-7642
NSN 7035-00-349-8571
NSN 5999-01-230-5376
NSN 5975-00-528-9774