I use 5/16 triple B chain in my windlass. Can I use 5/16 Grade 40 since the size is so close?
: Maybe. Possibly. Probably! Some windlass manufacturers say that the difference in length is so small there would be no problem substituting the stronger yet cheaper Grade 40 in this size. But you should ask your manufacturer just to be sure. I don’t want to be responsible for messing up your gypsy!