These screws are used for attaching your fans to your case. They are stainless steel with a black oxide finish that looks great compared to the standard fan screws.
https://www.performance-pcs.com/m4-x-7-x-30mm-black-oxide-steel-socket-head-cap-set-of-4-socket-m4-30-bk.html8777M4 x .7 x 30mm Black Oxide Steel Socket Head Cap - Set of 4https://www.performance-pcs.com/media/catalog/product/t/m/tmpsocket-m4-30-bk_01.jpg1.951.9500USDInStock/DIY/Fan Screws - Metal0 <p>These screws are used for attaching your fans to your case. They are stainless steel with a black oxide finish that looks great compared to the standard fan screws.</p>
<ul style="font-family: tahoma,arial,helvetica,sans-serif;">
<li><span style="font-size: small;" size="2">4 to a pack </span></li>
<li><span style="font-size: small;" size="2">Stainless steel with black oxide finish<br /></span></li>
<li><span style="font-size: small;" size="2">Steel pan head Phillips Drive </span></li>
<li><span style="font-size: small;" size="2">Thread Cutting Screw #10-24 </span></li>
<li><span style="font-size: small;" size="2">4 stainless mounting screws for fans.</span></li>
</ul>001.5000add-to-cartBlackScrewPhillipsM430mmStainless Steel