Those look like the ones.

John Rodgers
88 GL Driver

Jeffrey Schwaia wrote:
> John,
>
> You mean something like this:
>
> http://www.vanagonparts.com/temp/nuts.jpg
>
> Exhaust Lock Nut (VW #: 059 129 601)
>
> About $0.25/each
>
> For some reason, very few mechanics seem to use them.
>
> Cheers,
>
> Jeff
> www.vanagonparts.com
>
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM]On Behalf
> Of John Rodgers
> Sent: Wednesday, January 17, 2007 1:59 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Warning! Do not use...
>
>
> Geza Polony wrote:
>
>> stainless steel bolts on your muffler/catalytic converter.
>>
>> The more experienced among us know this already. I thought I'd beat the
>> corrosion problem by using M8 stainless bolts and nuts for my new Bus
>>
> Depot
>
>> cat and muffler. Once they heat up, there's no way to loosen them. I don't
>> know what happens to the steel, but it sure isn't any labor saver. The
>>
> heads
>
>> just break of when you crank them.  So much for good intentions.
>>
>>
>>
>>
> This may not relate, but on airplanes with piston engines, specially
> treated steel nuts are sometime used on exhaust studs OR special brass
> nuts are used. I think the nuts were more bronze than brass. In my
> experience the brass nuts were the nuts of choice, because experience
> taught that even the specially treated steel nuts could give trouble.
> Anti-seize was not used with brass nuts because they would be subject to
> backing off due to vibration. But the friction of the brass on the steel
> was sufficient to hold them in place, yet the brass was soft enough that
> when it came time to remove them they would turn loose of the stud they
> were mounted on. Sometime brass was left on the stud, but the stud would
> not be damaged. Far better to discard a brass nut, and clean the stud
> threads, than try to replace an exhaust stud - especially with the
> cylinder still on the engine and the engine in that airplane. It might
> be worth trying them on the WBX unless someone knows a specific reason
> why not to.
>
> Regards,
>
> John Rodgers
> 88 GL Driver
>
>
>
>
>
>