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 6240-00-275-1950
NSN 6220-01-467-2268
NSN 6320-01-029-4220
NSN 5996-00-945-3550
NSN 7035-01-343-6010
NSN 5960-01-388-1988
NSN 5895-01-212-2918
NSN 5999-01-203-7715
NSN 5925-01-609-4054
NSN 6150-01-241-0533
NSN 5910-00-262-7242
NSN 5985-00-107-6189