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: Articles of plastics & articles of other materials of heading 3901 to 3914, nesoi
NSN 5965-00-856-0552
NSN 5975-01-075-3393
NSN 5950-01-658-8347
NSN 5895-01-603-0729
NSN 6620-01-388-1430
NSN 5965-00-636-4926
NSN 6320-00-831-2227
NSN 5950-01-487-7198
NSN 6610-01-389-3082
NSN 5985-01-651-4949
NSN 6685-01-653-9860
NSN 5895-01-410-7717