Mounting screw size for Sony Optiarc AD-5670s?

Have a replacement drive for a broken SuperDrive. It's a Sony Optiarc AD-5670s slot drive and everything seems to fit and work well. The issue I am getting is the old standard screws don't seem to fit. The mounting holes on the Sony DVD drive all seem "smaller" than normal. I was wondering if anyone knew what size screws are used to mount this drive.