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 5925-01-359-4814
NSN 6650-00-338-7350
NSN 5950-01-559-7648
NSN 7035-00-946-2642
NSN 7035-00-946-2642
NSN 5935-01-389-6316
NSN 5895-00-203-2379
NSN 6645-01-373-2262
NSN 6145-01-505-6021
NSN 5835-01-518-4300
NSN 2925-01-174-6786
NSN 5990-00-147-3144