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 6105-00-986-8231
NSN 5935-01-311-6819
NSN 6110-01-564-6409
NSN 6650-00-224-3223
NSN 5855-00-560-0110
NSN 6130-01-540-8916
NSN 5855-00-014-5008
NSN 5990-01-200-7460
NSN 4140-01-164-4935
NSN 6240-01-189-4236
NSN 5945-01-643-8681
NSN 6110-01-097-6805