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 6105-01-299-4298
NSN 5925-00-379-0920
NSN 6150-00-241-5439
NSN 5999-00-119-3487
NSN 5999-01-634-0576
NSN 5925-01-339-0955
NSN 2925-01-250-2731
NSN 5945-00-474-4127
NSN 6150-01-514-0462
NSN 5975-00-232-7647
NSN 5895-01-486-1873
NSN 5965-00-328-6884