Review on 🛠️ Sierra International 18 3735 9 Marine Cotter: The Ultimate Solution for Marine Fastening by Shawn Tolbert

It's nowhere near Yamaha OE studs. They are much smaller. The original Yamaha part is much larger in diameter. I returned them because I never believed they would perform well in extreme conditions, such as holding a propeller on a boat engine in the Alaskan wilderness. Revain should take them off the shelf until Sierra International fixes them.