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 6650-01-364-4616
NSN 5985-00-245-0240
NSN 7035-01-542-7946
NSN 6105-01-025-4080
NSN 5835-01-229-6964
NSN 5965-01-111-6031
NSN 6105-01-270-3852
NSN 6220-01-073-5482
NSN 5935-00-909-4242
NSN 5950-01-035-0413
NSN 6645-00-269-2764
NSN 6650-00-221-9425