Posted by Chriscase [76.212.215.71] on Friday, July 16, 2010 at 18:01:51 :
In Reply to: Re: Poor bolts ? Pin hole drilled too large? posted by Terry [65.95.154.75] on Friday, July 16, 2010 at 09:55:45 :
Vs same file on different grades of bolts? File will barely tough high grade, sliding over it. Digs right in to low grade.
Examine bolts, high grade would show a crystalline fracture, fine grain. Low grade would show a smeared/sheared look.