Hey guys, you know those little shallow angle flat head screws that hold the corner brackets of a 100 windshield frame? What thread are they? I want to chase the thread in the bracket and the screws are too short to get a read on a thread gauge. I think they may be "BA #4" 38.5 tpi . The 38 tpi gauge looks close and the "D" is .137". Thanks Ray Juncal