Stainless bushing for backstay

[RoyB]

Backstay hydraulic cylinder piston has a 5/8" hole at the top. Backstay fitting has a 1/2" hole for a clevis pin. So there is a 1/2" clevis pin running through a 5/8" hole on the cylinder piston. The boat has operated this way for 7 years with no apparent harm. Nonetheless it bothers my sense of proper engineering.

I've considered using a piece of 316 tubing as a bushing so it fits properly but I would then worry about crevice corrosion where the tubing and the clevis pin meet.

As you can probably tell I'm being a bit compulsive about what is probably a non-issue.

Any advice from yon wise riggers?