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 6145-01-011-3231
NSN 5999-01-350-8656
NSN 5915-01-149-7002
NSN 5925-01-091-7220
NSN 5930-01-414-2620
NSN 5925-00-246-4645
NSN 6135-01-592-4139
NSN 6645-01-566-3205
NSN 5975-01-634-0678
NSN 5960-01-185-4216
NSN 5915-01-136-4035
NSN 5965-01-510-3456