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 5965-01-657-3412
NSN 5985-01-462-0144
NSN 5935-01-384-3707
NSN 6145-00-466-4068
NSN 5915-01-281-0471
NSN 6145-01-623-5619
NSN 5855-00-221-9435
NSN 2925-01-426-3410
NSN 5975-01-288-0415
NSN 5895-01-384-0611
NSN 6620-00-858-0715
NSN 5920-01-342-3681