It's crazy that NVME 2.0 SSD manufacturers don't include these with the boards. Be that as it may, these worked well for me. These particular standoffs have a little round nub protruding off the hex standoff. These are designed to capture the cutout in the board itself. I noticed some of the competitors to this item do not have that.
Whether it makes a big difference I couldn't say but I'm just OCD enough to want the right part.