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 5855-00-118-8762
NSN 5835-01-592-2350
NSN 5985-00-707-3473
NSN 6645-01-277-0530
NSN 2925-01-567-8027
NSN 5990-01-147-5225
NSN 5920-01-196-0933
NSN 5999-01-055-1907
NSN 6135-01-490-0278
NSN 5996-01-029-4196
NSN 6645-01-152-1092
NSN 5855-00-688-9954