What size pin

What size pin holds the reluctor in place on a small block distributor? The one that came out just drops in. Slop in the hole. Guessing its the hole itself but I want to mic the pin. This common?
Thanks in advance,
Scott

Uh, the ones I have seen/worked on . . . were all a roll pin . . . if it seemed "loose", just took a screwdriver and opened the slot up a bit to create enough interference to fit tightly . . . just my 2cents . . .