Um . . . duh.

<facepalms>

--
Rocky J Squirrel

On Thu, 2011-05-12 at 22:38 -0500, Tom Hargrave wrote:

> If that's what you are after then just use aircraft style locking nuts
>  - the ones with nylon inserts.
>
> Thanks, Tom Hargrave
> www.stir-plate.com
> www.towercooler.com
> www.kegkits.com
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Rocket J Squirrel
> Sent: Thursday, May 12, 2011 9:29 PM
> To: vanagon@gerry.vanagon.com
> Subject: Re: Modified carriage bolts?
>
> Thanks, all. I realized that I can anti-tamper the bolts simply by
> double-nutting them on the farside. They can spin the heads all they
> want but the nuts won't loosen.
>
> On Thu, 2011-05-12 at 18:44 -0700, Richard Koerner wrote:
>
> > Obviously, the square, rectangular, or oval shoulders under the head all serve the same primary purpose I would think....anti-rotation to torque.  So, not sure what your needs are, but there are other useful ways to add anti-rotation to a fastener--like pinning with a cross-holes (dowel pin) for example.  Uhh-h-h....maybe even Loctite....depends on what you are doing, materials involved, amount of anti-rotation desired.  Spot-weld?
> >
> > And I guess you could make your own rectangular shoulder with file and a vise.  But all depends on if you want to make the side of the square longer or shorter, right?!
> >
> > Also, there may be an option with a third component, like some sort of washer with....a square hole (ID) to fit your bolt but a rectangular feature (OD) to fit your situation.
> >
> > Need more specific information to solve.  Think outside the box?  Yeah....we do that here.
> >
> > Rich
> > San Diego
> >
> >
> > --- On Thu, 5/12/11, Alistair Bell <albell@SHAW.CA> wrote:
> >
> > From: Alistair Bell <albell@SHAW.CA>
> > Subject: Re: Modified carriage bolts?
> > To: vanagon@GERRY.VANAGON.COM
> > Date: Thursday, May 12, 2011, 6:21 PM
> >
> > there is an oval shouldered one in this handy ref doc on my blog
> >
> > http://shufti.files.wordpress.com/2010/06/jg.pdf
> >
> >
> > alistair
> >
> >
> >
> > On 12-May-11, at 6:08 PM, Rocket J Squirrel wrote:
> >
> > > Carriage bolts have a short square section of shank under the head.
> > > They
> > > are used in square holes.
> > >
> > > Is there such a thing as a carriage-type bolt that has a rectangular,
> > > rather than square, section under the head?
> > >
> > > --
> > > Rocky J Squirrel
> > > '84 Westfalia: Mellow Yellow ("The Electrical Banana")
> > > '74 Westrailia: (Ladybug Trailer company, San Juan Capistrano, Calif.)
> > > Bend, OR
> > > KG6RCR
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