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 6110-01-259-8224
NSN 5855-01-020-7982
NSN 6650-01-434-0331
NSN 2925-01-497-9381
NSN 5925-01-299-0389
NSN 5990-01-353-3691
NSN 5975-00-833-9596
NSN 5996-01-383-7018
NSN 6135-00-505-0679
NSN 5996-00-267-1139
NSN 6110-01-089-8130
NSN 5950-01-300-4078