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 4140-01-307-6322
NSN 5855-01-256-2551
NSN 6240-01-586-9718
NSN 6135-01-546-4588
NSN 5930-01-540-7750
NSN 6150-01-152-2650
NSN 5960-00-419-9964
NSN 5895-00-006-9014
NSN 5965-01-437-9721
NSN 6150-00-462-6365
NSN 6685-01-089-9606
NSN 6320-01-652-3806