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 5935-01-164-5708
NSN 5935-01-288-1856
NSN 6645-00-987-7829
NSN 5945-01-492-6208
NSN 6130-00-156-5698
NSN 5960-00-913-6195
NSN 5950-00-812-6106
NSN 6105-01-136-4472
NSN 6135-00-833-9909
NSN 6145-00-230-5268
NSN 6105-01-440-7373
NSN 6150-01-634-0575