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 6610-01-003-9763
NSN 2925-01-338-7126
NSN 5930-00-374-4839
NSN 6220-01-003-9126
NSN 6145-01-325-5145
NSN 5910-01-587-9421
NSN 6135-00-377-9165
NSN 6105-01-147-9264
NSN 5930-01-458-1696
NSN 6150-00-066-5544
NSN 6620-00-439-2442
NSN 6105-01-506-0156