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 6145-00-836-2241
NSN 5998-00-269-5444
NSN 5855-00-951-6483
NSN 6105-00-135-2180
NSN 6320-01-021-6633
NSN 6110-01-265-5040
NSN 5925-01-283-5889
NSN 5915-00-179-4623
NSN 5950-01-495-0873
NSN 5965-01-526-6131
NSN 5935-00-561-6183
NSN 6240-01-116-3382