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 6220-00-293-5368
NSN 5950-01-628-8642
NSN 5950-00-972-9976
NSN 5975-01-572-8450
NSN 5960-00-517-6206
NSN 6220-01-583-6724
NSN 6110-01-079-6332
NSN 6620-01-345-4835
NSN 6610-01-530-9167
NSN 6620-01-573-5794
NSN 5996-00-618-0050
NSN 6135-01-156-4627