It may very well be ... I just use / reuse screws that come out, and I've never really looked for anything specific.
Once I get my computer base life back in order, it's on my list of mysteries to work thru. But for now, I've got 325 email messages, and a TON of stuff to get re-installed so I can use it to deal with a mountain of paperwork ...
Not to mention $100 + of rebate bucks thru Newegg ...