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 6130-00-267-9970
NSN 6645-01-149-8400
NSN 5905-01-612-1444
NSN 5915-01-411-9395
NSN 5925-01-573-1310
NSN 5925-00-824-0329
NSN 6650-00-473-1259
NSN 6240-00-512-3473
NSN 6105-01-114-0145
NSN 5985-01-139-3689
NSN 6650-01-529-6416
NSN 5930-00-273-0778