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 7035-01-450-6795
NSN 5835-01-571-4083
NSN 5905-01-616-6841
NSN 5925-01-442-7357
NSN 5915-01-610-5168
NSN 5920-01-182-6610
NSN 5915-01-357-9468
NSN 5960-01-315-6993
NSN 6110-01-013-9313
NSN 6320-00-790-4844
NSN 6610-01-031-1113
NSN 5925-01-388-3325