On Mon, 12 May 2008 15:21:49 +0100, "Jeff" wrote:


Whist running a die over the thread will allow a 'normal' 259 the be
screwed
onto the socket it does reduce some of the thread to almost nothing, so I
would not recommend that method where there is any mechanical strength
required such as an antenna base.

73
Jeff

In over 20+ years of use I have never experienced anything like that.
If you think about it, the difference between the metric and american
threads - in the case is - is slight (Look just how far you can screw
a PL-59 on the meteric socket) and a very small amout of material is
removed.

What you will see if you actually try this method is that the threads will
be reduced in thickness over about half the length. The reduction getting
worse as you progress. The threads will have reduced to such an extent
towards the end as to render then no more than bumps. Have a look at one you
have done this to under a magnifying glass and you will see.

73
Jeff


Jeff,

The TPI between the two standards (American and metric) - in this
case - are very close resulting in very little thread stock being
removed. In the short thread length involved here (about 1/2-inch) and
the threads are not rendered to nothing more than bumps.However, at
longer thread lengths it well could be a problem, but not at the
1/2-inch distance we are talking about here.

Again I ask, have you actually tried this?

I have used this method numerous times for myself and friends and I
have never experienced any kind of failures or problems in doing so.

That said I'm going QRT on this subject.

73,
Danny, K6MHE