http://www.amazon.com/Hub-City-FB110URX5-Setscrew-Mounting/dp/B00ECZOXNY/ref=sr_1_28?ie=UTF8&qid=1445020629&sr=8-28&keywords=5%2F8%22+locking+collar
Double set screw locking collar and mount for securing rod to one side
http://www.amazon.com/Hub-City-FB110URX5-Setscrew-Mounting/dp/B00ECZOXNY/ref=sr_1_28?ie=UTF8&qid=1445020629&sr=8-28&keywords=5%2F8%22+locking+collar
Double set screw locking collar and mount for securing rod to one side