5mm Tnut
5/5
Decided to relocate power supply on ender 3.
there are many ways to do the task. I decided to drill the black plastic end piece and use some screw (5mm), washers and these Tnuts (5mm) to fasten it to the rail.
Spool3D has a lot of those hard to find parts to make changes to hardware.
Was happy with the order/pay then pickup when ready service, great for local customers.