RocknRoll-Thanks for that clarification. How about this saying- "See threads- You's deads"! So here is a question along that line.

Should a wrench be used to screw down the screw _link_? Lock it down, so to speak. I think Sherrill catalog says do it (or is he talking about the clevis?). What do you all think about that? Has anyone seen a screw _link_, be it delta or oval, unscrew itself?

Should this be a usage standard? The old addage- "screw down so you don't screw up."