Did some brake work on my truck over a month ago. There is a fitting that goes from the steel line to a fitting on a rubber line. When I took it apart and replaced the rubber line the male fitting on the steel line had some rust. When the rust came off neither standard nor metric would fit right. I took it apart with vice grips. The fitting did not get damaged or rounded off. I tightened it to what I thought was good by the closest fitting wrench. Apparently not tight enough as it is weeping. So now what ? I’m using line wrenches standard and metric and none are quite right ! Back to vise grips ?