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 5965-00-877-9197
NSN 5910-00-141-3868
NSN 5945-01-163-3028
NSN 5930-01-359-8953
NSN 5895-01-347-6191
NSN 6130-01-441-9001
NSN 5855-01-435-5548
NSN 5895-01-311-4484
NSN 2925-00-290-7052
NSN 6620-01-643-3048
NSN 5905-01-098-3106
NSN 6130-00-153-9468