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 5965-00-501-7835
NSN 5975-01-280-5371
NSN 5920-00-102-3792
NSN 5930-01-435-5470
NSN 5950-00-171-2894
NSN 7035-01-141-3041
NSN 6610-01-406-6696
NSN 5950-00-041-6554
NSN 5990-01-303-6110
NSN 5999-01-387-2128
NSN 5895-01-103-9830
NSN 5920-00-326-9901