Replace receiver screws on Stevens 200?

I spent a few hours this weekend working on my new Stevens 200 .223.

I removed some stock material to allow the pillar to contact the receiver, and then tinkered around with "stress-free" fit. Lot's of remove / re-install receiver into stock.

The hex heads on my receiver screws feel a bit "wallered out". I dremeled off an 1/8" from my Craftsman 5/32 hex wrench just to be sure the tool wasn't worn, but the screw heads still felt loose.

I'm not at home right now, but would like to order some screws today. Anybody know the specs off the top of their head?

I wonder if any of you guys routinely replace these screws, and if so, what do you use? Mcmaster Carr, etc? Or just buy replacements from Savage?

Thanks!

Hardware store 1/4-28 usually about $.50 apiece.

1/4"x28tpi 1 1/2" and cut to length

Thanks!