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 6145-01-584-9541
NSN 5935-01-459-7685
NSN 6220-00-019-1945
NSN 6110-00-232-5406
NSN 6105-01-120-6014
NSN 2925-01-519-3221
NSN 5930-01-029-2803
NSN 5920-01-322-2572
NSN 6220-01-540-8179
NSN 6650-00-161-4122
NSN 5895-01-460-2759
NSN 6105-01-105-8332