So I have a slim model 2012a that had poor threads in the heatsink. Long story short. I broke one of the screws and had to drill it out. I went online and found that only a few sellers are selling the bracket and screws for this particular model. I also looked for shoulder screws and found none avail in my local hardware websites. My question is, whatc I use in place of it? I was thinking m3 screws with washers. Any important things I should take note of? Any help is appreciated. Thank you.