These are two of standard screw sizes for National Resonator Guitar Wooden Support Bars that go under the ends of the fretboard on early guitars
These are slot heads countersunk, so the same the originals, but they are stainless steel. The nuts are zinc plated.
The wooden support and third screw are shown for clarity only and not included.
Postage £2 to UK, £4 Europe, £4.50 for USA and rest of the world