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 5920-01-410-2893
NSN 6145-00-246-9776
NSN 6135-01-421-6373
NSN 5998-01-167-9000
NSN 6135-00-913-2062
NSN 5985-01-634-0635
NSN 4140-00-517-7902
NSN 6645-00-900-5830
NSN 5910-01-643-3017
NSN 6240-01-534-2987
NSN 6110-01-263-6499
NSN 6645-01-268-0544