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 5965-01-510-1902
NSN 5895-00-525-3295
NSN 6240-00-438-6999
NSN 6645-00-678-0914
NSN 5910-01-433-3054
NSN 5999-01-265-2200
NSN 7035-01-397-5009
NSN 5915-01-276-7225
NSN 6645-01-560-0738
NSN 5835-00-405-1099
NSN 5905-01-267-3946
NSN 5855-00-221-9435