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 6150-01-594-2384
NSN 5960-01-431-4291
NSN 6145-01-322-8830
NSN 6610-00-419-3154
NSN 5925-01-206-1186
NSN 5999-01-055-7498
NSN 6135-01-589-0333
NSN 5990-00-952-0696
NSN 6240-00-724-5421
NSN 7035-00-763-6180
NSN 5960-01-293-4536
NSN 6610-00-419-3154