In a message dated 11/19/05 4:42:43 PM, rogersisler2000@YAHOO.COM writes:

<<  With the bolt,I dont have to fear that shifting of cargo will break the
bleeder screw.  >>

Unless you make or find an M10 X 1.0 nylon capscrew (bolt) your only worry
will be that you strip the tapping in the heater core.

I once had to resort to substituting a stainless capscrew for the bleeder in
a rear heater core, but, once the bleeder hole in the heater core was plugged
I did not want to keep running the capscrew in and out of those plastic
threads every time I was going to bleed the system.  So, before I wrung it in, I
grooved it for the O-ring, drilled it through and tapped it for a smaller
capscrew which was installed with a fiber washer (it's a good way to use up old Amal
carb kits).  The small nested screw became the bleeder with the M10 capscrew
staying put whenever it was time to vent the coolant system.

George