We'll see if these work. 60 degree cone, fit the OEM stud.
Comparison to the old crusty ones I dug out of my box-o'parts left over from my time as a Europa breaker looks like they're the same.
16x of Moss part #674-625 in the Spitfire parts listing. No financial interest, yadda yadda yadda. Need I say that?
So...when the steelies come back...we'll use them. Always good to have a few extras on hand, right?