Please help me, I'm failing... I have a 701, but I have a feeling this question is generic. What do you ask for when you're looking for a gas tank nipple, or a Carter N fuel inlet fitting, or a fuel pump tube and fitting. I could add - a drain plug for a 5025 transmission? These pipe thread designations are mind boggling. I can probably forget metric for the old stuff, but maybe there is a correlation. Has anyone got a list? I want to help this old gentleman to get back on his feet. Thanks a lot.