Product review (5 stars): Works on my Samsung RF31FMESBSR
Works on my Samsung RF31FMESBSR/AA (the one with the SodaSteam in the door). After installing and confirming it is the correct part (Samsung wants you to buy the entire mullion assembly, not just replace the break-over spring and therefore does not publish the spring part number) I decided to purchase two more while they are available. Since my spring broke in first 3 years of ownership I estimate it will break another 2 times at least during my ownership lifetime. Most difficult part of installation is getting the mullion assembly opened, The two halve want to snap back together until you get most/all the tabs disengaged. There are several good videos out there describing the process. Amazon won't let me post the URL for the one I used so you'll need to search on your own.  Good luck and good hunting!