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 5965-01-046-9619
NSN 5925-00-833-8291
NSN 5950-00-202-1066
NSN 7035-01-421-4446
NSN 5915-00-957-6970
NSN 6145-01-535-8007
NSN 5985-00-107-2725
NSN 5915-00-078-9574
NSN 5996-01-655-6759
NSN 5920-01-007-6165
NSN 6150-01-552-1073
NSN 5925-01-498-9068