Threading a 4-40 rod - what size to start with??

[Martin X. Moleski, SJ]

--On Friday, November 14, 2003 6:17 PM -0600 Keith Hoard <khoard at midsouth.rr.com> wrote:

>     What size rod do I need to cut 4-40 threads?

1/8" welder's rod.  "Use a 5-40 and then 4-40 die nut from
> www.micromark.com..." (Fred McClellan on rec.models.rc.air).

> 2-56??

Dunno.

> I tried cutting threads in some 4-40 threaded rod I bought at the LHS,
> but it seems the rod diameter is too small to get a good set of threads
> from using the die.

Right.  The hobby shop stuff usually uses "rolled threads"
rather than die-cut.

						Marty #2874
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