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 5915-01-046-9296
NSN 5930-01-247-1728
NSN 5996-01-133-8211
NSN 6650-01-331-5243
NSN 6650-01-317-7975
NSN 6150-00-124-7247
NSN 5895-01-386-4478
NSN 6240-01-231-9243
NSN 5945-01-122-8141
NSN 6685-01-210-7059
NSN 4140-00-305-1023
NSN 6130-00-548-2952