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 6105-01-127-4035
NSN 5855-00-869-3635
NSN 5985-00-461-1745
NSN 5930-01-364-0943
NSN 5920-01-160-9260
NSN 5925-00-482-2396
NSN 5999-01-348-5717
NSN 5910-00-997-9413
NSN 6650-00-266-6808
NSN 5915-01-179-5351
NSN 5945-01-329-3649
NSN 5895-01-169-8110