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 6110-01-115-3871
NSN 5930-00-488-4847
NSN 6650-01-483-4267
NSN 6105-01-493-8690
NSN 6105-00-895-4051
NSN 4140-01-082-2249
NSN 6105-00-583-9958
NSN 5999-01-345-1994
NSN 5975-00-636-4910
NSN 5950-01-079-3746
NSN 6645-00-547-4388
NSN 5990-01-242-9653