Tom Grace seeks a source of bronzed steel oval head screws.

Try  http://www.mcfeelys.com/  They sell a _bunch_ of different
Robertson Head screws, but also have silicon bronze screws which they
tout for shipbuilding.

I also use the screw size you indicate, but I obtain mine from a vendor
in St. Louis as a "special", which means I have to order thousands of
them at a time.  If you don't find what you'd like to have at McFeely's,
contact me privately, and we'll "go together" on an order for these
from my vendor.  My stock is kinda running low also!

Faithfully,

Richard Schneider
Pipe Organ Builders
Kenney, IL  61749-0137
http://www.schneiderpipeorgans.com/