Please help me get some nuts.

[NSFW]

I have a set of Tokico shocks and struts that I'd like to install soon, and I'd like to do it in a way that will let me swap out the stockers and Tokicos by switching out the complete assemblies. To do that I need an extra set of the nuts that hold the top-hats to the shocks and struts.

 

Is it reasonable to just head to a hardware store and buy some locknuts with the right diameter and threading? Or should I get special Subaru nuts? Are they any different from regular nuts? Like, flanged, or taller, or... ?

 

Thanks!