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 5915-00-501-3390
NSN 2925-00-193-2402
NSN 5895-01-207-0036
NSN 5950-01-651-0881
NSN 5910-00-766-6272
NSN 5990-01-061-4169
NSN 6145-00-106-0611
NSN 6130-00-341-5175
NSN 6240-01-266-2887
NSN 6650-00-389-4111
NSN 5960-00-496-6473
NSN 6650-01-194-6997