Thumb Thumbs

Is there a general rule of thumb for the amount of travel from all the way up until it. Jun 6, 2010my favorite for fuel lines are the hotrod thumb screw clamps from the early 50s. I found some nos eelco thumb screws a few.

There are lots of "rules of thumb" about what should be parallel or pointing up or down. Nov 30, 2004a good rule of thumb is, whatever you can add going from 1.5 to 1.65 rockers, i.e.