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.
NSN 6130-01-153-2265
NSN 6610-00-078-9620
NSN 6320-01-399-6177
NSN 5945-00-332-2007
NSN 6145-01-613-3598
NSN 4140-01-264-7466
NSN 6220-00-520-9109
NSN 5935-01-119-1481
NSN 5935-01-152-2280
NSN 5935-01-399-0289
NSN 5935-00-848-6435
NSN 5915-01-407-6169