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 5950-01-435-5478
NSN 5835-00-764-4388
NSN 6645-01-234-5555
NSN 6220-01-467-9608
NSN 5996-01-601-5777
NSN 7035-01-083-0282
NSN 6145-00-682-2475
NSN 5985-01-364-0961
NSN 5960-00-979-7303
NSN 6145-01-338-8344
NSN 5920-01-430-4081
NSN 5935-01-378-8800