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 6135-01-530-8136
NSN 6320-01-516-3836
NSN 5999-01-331-0628
NSN 5950-01-440-2786
NSN 5920-01-317-0467
NSN 5965-01-618-2703
NSN 6320-00-831-2227
NSN 7035-01-658-1623
NSN 5895-00-216-5849
NSN 6320-01-225-9963
NSN 5925-00-328-3885
NSN 6650-00-519-0973