1982 gpz 750 36mm throttle plate screws

Anyone no where I can get these screws?

I bought a bag of them from China as I was not able to find any that were predrilled. 
Have made my own collet holder to be able to drill them in the lathe.
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Measure / verify the diameter and thread length:

www.mcmaster.com/screws/thread-size~m4/head-type~flat/

Agree on measuring.  Diameter and thread pitch.  

BTW, those carbs are 34mm.  

If you get stuck, I probably have some spares.  Not a full set though.

And since it looks like you media blasted all the parts the steel parts will rust post haste unless you replate them, or at least paint.  Zinc plating with chromate is recommended.

Nessism is perfectly correct, you will need to zink plate and cromate the steel hardware. But you also need to be able to secure the screws so they dont end up in the cylinders.
therefor my comment about drilling them so that you can flatten out the ends.
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For what it's worth...Wired George media blasts the carbs he rebuilds and then sprays them with some clear coat junk.  I've rebuilt a few sets that he previously rebuilt, after the owner couldn't get them to run right.  I found blast grit all through the inside of the carbs.  The blasted parts were starting to rust too.  Not a fan.

Cerakote works like a charm. Looks OEM but resistant to chemicals and thin for reassembly!

I plugged everything up as to not get the insides blasted.