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 5998-00-911-5398
NSN 5990-00-717-8022
NSN 5930-00-902-5874
NSN 6135-01-540-9655
NSN 5975-01-581-6418
NSN 6610-01-383-1830
NSN 6320-01-516-3836
NSN 5910-01-552-6266
NSN 7035-01-314-7559
NSN 5975-01-262-4136
NSN 6150-00-189-0292
NSN 5925-00-243-8694