I used this part while building my own custom PC case. You can find photos of them in use in the blog post below.

I printed it in ABS to better withstand the heat inside the case, though I believe PLA would also work for most applications.

You need 5x25mm standoffs and 3mm screws.

Blog post: https://shalyk.com/forge/case-iii-the-toolbox

Reddit post: https://www.reddit.com/r/mffpc/comments/1lm01ka/made_my_own_case_back_in_2025/