stainless pan head screws with ESN lock nuts.
On the shackles, NEVER buy the cheap no-name shackles for use on your boat. Just don't do it! Buy those nice pricey French made shackles with the max load stamped on them, I forget the brand.
Jimbo
They are called "Wichard". Rick carries them.
http://store.catsailor.com/tek9.asp?pg=products&grp=279&mode=massorderWhat are ESN lock nuts?