ILCA threaded pin for rudder of ILCA (Laser) regatta axis. Large diameter (10mm). 

The Laser rudder bolt connects the rudder blade to the rudder head and allows the rudder to pivot up and down. This is an upgrade from the older bolt with bushing set up, which had a two piece plastic bushing and a more narrow bolt. With this larger diameter bolt, the plastic bushing is no longer needed. This is standard on all new Laser rudder assemblies since 2015.