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 5945-01-514-7952
NSN 6610-01-199-0499
NSN 6220-01-470-7388
NSN 6240-01-463-3132
NSN 5960-01-088-6553
NSN 6240-00-451-5000
NSN 6650-01-064-6196
NSN 5920-00-946-9147
NSN 5895-01-165-7436
NSN 6220-00-725-7494
NSN 5999-01-576-9247
NSN 6150-01-455-7067