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 6130-01-652-5553
NSN 5960-01-185-3043
NSN 6240-01-058-7207
NSN 6145-01-169-1683
NSN 5925-00-232-3256
NSN 6130-00-399-0729
NSN 5985-01-179-3810
NSN 5950-01-593-4566
NSN 5998-01-243-2365
NSN 6685-00-398-0341
NSN 6150-00-761-4917
NSN 5960-01-612-9844