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 6610-00-887-9457
NSN 5990-00-632-7106
NSN 5920-00-650-6562
NSN 6145-01-180-9419
NSN 6135-01-320-4815
NSN 5920-01-122-4181
NSN 6650-01-044-5057
NSN 6610-01-288-6103
NSN 5996-01-351-1558
NSN 6620-00-871-0592
NSN 5935-01-460-6495
NSN 5996-01-209-5886