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 6320-01-585-8468
NSN 6610-01-344-0972
NSN 5945-01-304-8640
NSN 6145-00-170-5274
NSN 5965-00-698-0433
NSN 6105-00-703-1415
NSN 5965-01-196-7760
NSN 5996-01-357-7535
NSN 5945-01-268-9522
NSN 5905-00-836-7700
NSN 6610-01-248-4339
NSN 5935-00-106-0177