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 5945-00-698-7532
NSN 5835-01-647-6426
NSN 6150-00-163-6165
NSN 5910-01-202-6167
NSN 6130-00-239-5988
NSN 5965-00-207-9696
NSN 6150-00-302-1448
NSN 6110-01-035-5735
NSN 6320-01-021-6633
NSN 5935-01-443-9987
NSN 6645-00-646-6631
NSN 6240-00-398-0740