In a message dated 12/10/04 1:02:24 PM, dhaynes@OPTONLINE.NET writes:

<< Just get a 10 X 1.0 bolt. >>

This is an improvement.  I did it once on a dreary Sunday night and it worked
well.  The fastener I used might have been a drain plug from an R-bike, but
it had a hex head and the right thread.  I wasted away the threads adjacent to
the head to form an o-ring groove.  I also through drilled it and installed a
1/16-NPT truck valve because I figured that the threads in the plastic of the
heater core would eventually queef out if I ran that steel bleeder plug in and
out too often.

George