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 5965-00-752-5823
NSN 5999-01-516-8509
NSN 7035-01-555-8793
NSN 5835-01-386-4027
NSN 6240-01-473-7798
NSN 6240-01-584-6774
NSN 2925-00-540-9918
NSN 2925-01-466-0892
NSN 5985-01-573-0514
NSN 6220-01-563-3388
NSN 7035-01-194-9482
NSN 5999-00-081-0305