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 6685-00-479-3490
NSN 5835-00-928-5717
NSN 5998-01-207-0778
NSN 5895-01-412-0950
NSN 6240-01-452-7006
NSN 5925-01-302-7208
NSN 5935-01-504-5501
NSN 5950-01-535-0680
NSN 6110-00-807-9508
NSN 6110-01-463-2421
NSN 6105-01-305-1014
NSN 6240-01-482-4819