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 5996-01-150-2800
NSN 5925-00-964-9654
NSN 5905-00-879-3003
NSN 5835-01-199-1683
NSN 6145-01-177-1842
NSN 7035-01-182-1086
NSN 6145-01-596-4356
NSN 6145-01-075-1042
NSN 5996-01-291-3076
NSN 5990-01-281-0018
NSN 5835-01-442-6482
NSN 5990-01-199-4832