I have a Parker that is in need of some screws for the trigger plate. The originals have been "buggered" up and need to be replaced. They are 8-36 and need to be 5/16" long; could be longer, fillister head. I tried NECG and they keep sending me metric. The ones listed as replacement in Brownell's are made or furnished by them and are metric.

Brownells sells blank, #8 fillister head screws that you can thread and cut to any length you want.

What are the sizes of the metric screws that were sent to you? 8-36 is real close to M3.5X0.7.
Just a possibility.

Jim, you old rascal, just drive out of Reno, take highway 14 south to .......... Hell you know the way.

I should have read your post, lol. Galazan has them. You get all 11 action screws for $35.

Parker action screw set

I mentioned NECG in the original post but Chic made me rethink it, they were from Galazan and don't fit.