Part# for dust cap

Anyone have the correct dust cap part # for a 67 barracuda with KH disk brakes?

Napa and search on dorman website says it is 1 9/16 diameter. That is way to small. Bought a 1 25/32 from napa and it is the right size diameter, but it aint deep enough....bottoms out on the spindle.

Saw a previous post where someone said dorman 618-101 is the correct part# (1 25/32) but their website says it isn't the correct one...