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 6105-01-086-6149
NSN 5915-00-319-8434
NSN 5930-01-236-1531
NSN 5998-00-107-4489
NSN 5930-01-574-0607
NSN 6320-01-407-8663
NSN 5965-00-246-5612
NSN 6220-00-802-3369
NSN 5990-00-186-2445
NSN 6130-00-643-0425
NSN 5950-01-485-0246
NSN 7035-01-565-3155