I'm 'into' classic cars,I own a few and run a classic car forum.
U bolts in stainless might be an idea,as well as nut and bolt packs in UNF and UNC. Plain and locking washers might be worth a go too.Stainless hose clips (even the old fashioned wire type) are a popular item with classics as well as stainless tubing for fuel pipes etc.
Let us now what you intend to do
regards Kevin at Baconsdozen.