mmiller wrote:
The issue was very inconsistent over the years. No way to tell you. The rolled thread ones were better, but they were still stamped to flatten the heads and some of these have failed. Understand that the rate of failure is very low compared to the number of boats built. Some may have been from sloppy rigs while stored on the beach and the pins got impact loads repeatedly as the mast moves around.
The current pin now has a machined head and is as bulletproof as I can imagine.
They seemed to get visible cracks before failure, so inspection is key.
Sounds good, thank you.