Posted by tom in chicago [75.59.224.33] on Wednesday, July 15, 2015 at 06:08:33 :
In Reply to: Interesting bolt heads posted by Sherman in Idaho [72.47.153.158] on Tuesday, July 14, 2015 at 23:31:35 :
Sherman,
Found some info on these.
Rockford bolt and steel company and some marking info from a Ford site.
Tom