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 5945-00-462-6569
NSN 6220-00-187-6072
NSN 6150-01-501-4906
NSN 7035-00-252-7467
NSN 6685-01-327-2099
NSN 6150-00-571-6360
NSN 5960-00-869-1969
NSN 5935-01-610-2100
NSN 5965-00-106-3195
NSN 6320-01-573-6490
NSN 6110-00-752-2757
NSN 6105-01-349-3317