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 5835-01-351-8429
NSN 6320-00-731-6134
NSN 5985-01-259-2701
NSN 6110-01-586-4791
NSN 5935-00-900-0331
NSN 6105-00-381-5795
NSN 6320-01-054-3046
NSN 5935-01-555-8874
NSN 5855-00-491-7079
NSN 5920-01-462-9027
NSN 5930-01-609-3745
NSN 5905-00-203-5400