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 6320-01-422-1212
NSN 5945-00-335-6316
NSN 5855-01-551-7923
NSN 5950-00-886-9670
NSN 5835-00-554-0399
NSN 6150-00-336-9057
NSN 6320-00-089-9426
NSN 6110-00-244-2308
NSN 6650-01-577-1304
NSN 6610-01-452-5180
NSN 5985-00-554-4599
NSN 5965-00-168-9624