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 6130-01-527-1462
NSN 5855-00-401-3442
NSN 5985-01-361-2811
NSN 5855-01-191-3404
NSN 5998-01-265-9371
NSN 5990-00-481-0787
NSN 6105-01-021-4016
NSN 6150-00-351-0238
NSN 5998-01-451-0733
NSN 7035-01-449-1846
NSN 5985-01-037-0923
NSN 5999-00-283-8722