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 7035-00-445-9657
NSN 6145-01-430-0099
NSN 6320-01-481-7322
NSN 5999-01-232-3452
NSN 6685-01-066-1317
NSN 6610-01-050-3075
NSN 6620-01-463-1373
NSN 6145-00-801-4621
NSN 5998-00-866-4605
NSN 5895-01-391-2521
NSN 5965-00-504-6753
NSN 6240-00-215-8550