Hood spring question

Yeah that's odd because I was just putting mine on and I connected one and it held the hood without me even connecting the other one. I actually while I walked over to the other side and connected the other one.
It is the factory fastener, just a one way washer.

Ace is the place....
my ACE doesn’t have it. I’ve spent the last hour trying to find one on the internet over 3/8. The stud my spring mounts on is 3/4”. Tough size to find.