Can anyone shed some light on the thread size for our crossmember bolts? After installing my Budbuilt CM and skid, I thought it was a shame to have those bolt heads sticking out exposed like they are. Figured I could get some sort of lower profile "button" style cap screw from Mcmaster-Carr, but found that these things don't seem to fit anything. No go in my tap and die set or at the little sizing guides at the hardware and auto stores. Ideas or info? Thanks.