u/Low_Butterscotch5961

Hi, I'm having a look at the radiator drain plug and bleeder valve because I thought it would be a good time to replace the O rings in them, though I've had a look and it doesnt seem to have an O ring at all. Should there be an O ring? I can't see an old one anywhere on it. I have an aftermarket radiator which was installed before I got the car so I'm not sure which specific radiator it is and it has no logos on it.