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 5930-01-048-9760
NSN 6110-01-498-2747
NSN 5935-01-118-7768
NSN 6320-01-279-0343
NSN 5910-00-970-8188
NSN 4140-01-246-3090
NSN 5895-00-836-6236
NSN 5935-00-138-3289
NSN 5985-00-490-1829
NSN 5910-01-226-3582
NSN 6110-01-381-0469
NSN 6145-01-055-6340