67 Dart sill plate screws

Does anyone happen to know what kind/size screw is used for the door sill plates on a 67 Dart? I tried a few screws already installed on the interior, but can't find a match for the size..

They are a special screw about 1/2" long with s semi-round head and a flat spot where the phillips cross is. I believe R/T Specialties has them.

Thank you sir, I'll check with them. Merry Christmas.

I also have them in stock:
http://cgi.ebay.com/ebaymotors/Mopar-196...Q5fAccessories.

They're call a truss head screw. #8 and chrome plated

Thanks guys, I actually picked some up at Lowes -- not the correct kind, but a #8 x 1/2" which did the trick.