Arrow...call them (helidirect) and talk to an idiot...errrr... I mean representitive, and see what you can find out. If you get the run-a-round, take it to a local hardware dealer and gauge it out...we know it's METRIC. To shear...it has to be very soft (grade 2-3?). You can get a generic replacement fairly easy...it's a bolt...that's all it is. You need thread pitch in metric and length, plus type of head (socket head allen/pan head/phillips?).