the 590-593 parts are aluminum and at the top of the page, while the 562,905 are plastic equivalents about half way down.
i realize the ball stud is english thread, but doesn't the silva shock have metric thread? i thought it looked like a 3mm ? oops, i think i answered my own question, the 562 is plastic so it fits the metric thread without issue
The Silva shock is 4-40 threads on the ends.
