The depot manual describes them as " 8-32 x 3/8" binder head screws "A more complete description would be an SAE (English measure) #8 cup head machine screw with a pitch of 32 threads per inch and the threaded portion being 3/8ths of an inch long. I recall them as Philips head stainless, the depot manual shows a beveled washer under each screw.Here's a picture of the more common cadmium plated parts: Stainless would be less bright in color. The depot maintenance manual can be downloaded from a variety of sites free of charge and is very, very complete.
Seems to add some confusion here ?