Actually the more common thread pitch on M8 threaded bolts and nuts for DIN
(European) standards is 1.25, with 1.0 coarser threaded being used for like
say, the 8mm valve adjuster screws and jamnuts on the Type 1 & 2 1600
engines.  A lot of Asian vehicles tend to use finer 1.5 thread pitch on
their 8mm metric fasteners, at least they did my Ex-Toyopet & H*nda.  This
is also known as JIS Standard as opposed to DIN Standard.  18mm on European
vehicles is usually 1.5 thread pitch, such as the O2 sensor.

As to answer Joe's question, the "Time Box" is threaded on both sides.  The
push-in clip is only done at the speedo end of the cable from 82 onwards
AFAIK.
--
Jim Thompson
84 GL 1.9 "Gloria"
84 Westfalia 2.1 "Ole Putt"
73 K Ghia Coupe "Denise"
72 411 Station Wagon "Pug"
oldvolkshome@gmail.com
http://www.oldvolkshome.com
***********************************
On Thu, Apr 3, 2008 at 2:28 PM, Roger Sisler <rogersisler2000@yahoo.com>
wrote:

> Imagine the thread pitch on an M8 bolt. M8 is the common bolt on the
> Vanagon
> that takes a 13mm wrench. The usual thread pitch on this bolt is 1.5. Does
> that look like about the threads on the speedometer cable? I think the TP
> on
> the speedometer is much finer than 1.5, but I have not checked lately.