A mil-spec A2 stock screw should be phosphate finished, and include a red Nylok patch with a drain hole all the way through the length of screw. The screws I received were black oxide finished, with no red Nylok patch. They did have the drain hole, but they also came to me already rusting due to the finish. They also just look to be very poor quality. Similar (if not the same) as these screws shown here. >
https://retrorifles.com/buttstock-screw/
I can live without the red Nylok patch if the screw is good quality in every other way, but the ones I received were not as advertised.