On a newer Hartzell prop hub I noticed a plug in place of two of the four zerk fittings that are on my 2013-vintage hub. The hex head calls for the same 5/16" wrench as the zerks. I think it's a smart idea as it becomes obvious which two zerks to remove and which two to grease.
It looks like a hex bolt but the thread isn't SAE. What is that item; where can I obtain a couple?
It looks like a hex bolt but the thread isn't SAE. What is that item; where can I obtain a couple?