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 5835-00-864-4481
NSN 5835-00-233-6327
NSN 5835-00-155-1379
NSN 5935-01-080-4422
NSN 5998-01-449-7273
NSN 6150-00-376-8349
NSN 6130-01-546-6969
NSN 5895-00-670-1783
NSN 6320-01-442-3428
NSN 6105-01-250-3591
NSN 5965-01-568-2681
NSN 5920-00-042-6435