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 6610-01-109-1826
NSN 5965-01-205-6249
NSN 5920-00-356-4641
NSN 6105-00-840-6433
NSN 6220-01-624-7803
NSN 5935-01-246-2855
NSN 5965-01-133-3985
NSN 5950-01-263-6963
NSN 5835-00-912-5656
NSN 5985-01-632-2587
NSN 5935-00-171-3003
NSN 4140-00-470-7557