So, I accidently broke off a small grease fitting (zerk fitting?) on the rod ends on my JimFab traction bar. The fittting appears to have a #6 size thread, but I'm not sure. It also has a 1/4" hex wrench size. I went to the auto parts store and they only had huge *** fittings. Does anyone know where I should look to buy a new fitting?

...oh yeah, I checked McMaster already and no luck there.