Originally Posted by John Kennett
It will be metric. We've been using ISO metric threads in the UK since the 1960s.
Okay cool. Now I'm having trouble finding a supplier that will ship to the US or one in the US with a bolt length at least 17mm, as it needs to be long enough to reach the bolts inside the hull. The plastic bolt blanks are 7/8".
I'm also confused about the breaking points. It seems like the 316 eye bolts have less than half the strength of galvanized m10 eye bolts (500# vs 1160#). At a 45 degree angle 500# will only give me a breaking strength of around 100# and that won't cut it.