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 5985-00-010-7754
NSN 6645-01-025-1002
NSN 5915-01-451-4198
NSN 5930-01-355-3780
NSN 5990-01-421-3325
NSN 5985-01-321-8561
NSN 6105-00-451-6563
NSN 5985-00-436-0489
NSN 5965-00-913-9545
NSN 5855-01-658-4510
NSN 5935-01-660-6725
NSN 4140-00-247-4773