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 5985-00-816-8486
NSN 6620-00-736-8457
NSN 2925-01-597-9541
NSN 5950-00-290-8090
NSN 7035-00-834-2090
NSN 6240-01-359-2721
NSN 5920-00-152-4003
NSN 6220-01-082-8769
NSN 5990-01-471-0494
NSN 6320-00-676-9387
NSN 5960-00-270-8171
NSN 2925-01-290-7060