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 6105-01-523-3368
NSN 5920-00-156-4482
NSN 5990-00-476-4336
NSN 5920-01-454-5147
NSN 5975-01-585-9679
NSN 5920-00-081-9156
NSN 5905-01-026-9636
NSN 6110-01-367-4618
NSN 6130-01-234-7451
NSN 6105-01-450-9402
NSN 5965-00-823-8623
NSN 5835-00-155-1379