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 5960-00-930-5360
NSN 5925-01-332-6524
NSN 5975-00-161-4947
NSN 6220-01-535-6968
NSN 6620-01-651-5425
NSN 5945-01-390-7775
NSN 5950-00-383-6702
NSN 5930-00-707-6899
NSN 6105-01-027-1135
NSN 6135-00-973-5632
NSN 6135-01-344-9766
NSN 5935-01-012-1850