I have a 64 Dodge Sweptline d100, one of the front hubs had the drum replaced at some point by a previous owner and it appears that they pressed out the studs without removing the swage first. Thus, the hole in the hub is enlarged so much that the replacement studs that fit the other sides hub perfectly, just drop into this hub and spin even when turned by hand. The new studs I have have a knurl of .635 when measured with a caliper.

Anyone know a part number for a stud with a larger knurl that might work on my front hubs?