Might be. Drilling went fine until about 1/4" in. Perhaps I did work harden the stud.

alistair

On 2012-07-04, at 8:13 AM, Jack Botts wrote:

> My guess would be that this stud had been improperly hardened. Perhaps it went thru the furnace more than once, and/or it fell off a conveyor, did not get annealed, and then was put in the bin with good studs. > Date: Tue, 3 Jul 2012 15:06:47 -0700
>> From: albell@SHAW.CA
>> Subject: exh stud - drilling out is tough
>> To: vanagon@GERRY.VANAGON.COM
>> It is as if I have hit some harder steel.