Re: [T3] '66 seat belts

["Jim Adney" <jadney@vwtype3.org>]

On 17 Feb 99, at 21:10, Dave Hall wrote:

> Sorry Jim, I can't agree with you.  The original fit bolts are not a
> true metric size.  If you get a rusted one, it's very difficult to
> remove it without wrecking the bolt head.  Most of the aftermarket
> kits I've used, and current VW belts, have 17mm-head metric bolts,
> but the thread is the same (M12 x 1.5 maybe?).

Well! Just go ahead and cast down that gauntlet! I'll just march down 
and measure one. Oh? I see it is a 17mm.  Well maybe I was wrong 
about that....

> The adapter I mentioned for very early ones is on page 85 in the
> parts illustrations (B48 in parts book), part 14, no. 311 857 761;
> M24 x 1.5 to 7/16" adaptor.

Now I measure the diameter and it is, What? 11mm??? What an ODD 
(odd??) diameter for a metric bolt?? Wait, 11mm = 7/16", huh??? 
What's the pitch?  20 tpi??? NO S**T Sherlock! An OE English thread 
defiling my VW! It's almost enough to want to sell out and move on.

And up to this point I had just thought your musings were the lunatic 
ravings of a Limey what's been out in the l†¬long without his 
Gin & Tonic.  ;-)

> Subject: RE: [T3] '66 seat belts
> 
> 19mm is almost exactly 3/4" so this is just .020 less.
> The correct wrench for these bolts is 19mm (or 3/4".)

Well, I still think a 3/4 or 19mm wrench should work here. A 64th 
under would be better, but who has a 47/64" wrench?

If that 18.5mm bolt has a 24mm thread behind it, then that is one 
heck of a strange bolt.

Jim
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Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
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