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 5915-01-120-3340
NSN 6320-01-384-3850
NSN 5975-00-674-7974
NSN 5935-00-001-5746
NSN 6130-01-417-7589
NSN 5996-00-213-7121
NSN 6320-01-307-0467
NSN 5915-01-159-7016
NSN 5950-01-274-9211
NSN 5935-00-876-0534
NSN 5996-01-227-4496
NSN 5965-01-065-5544