Is that nut on far enough? It looks like it's hanging on the last thread. I had my Hammerhead block milled on the right side like he guy above. Compare the thickness to the stock block. Check this thread from a while back. http://www.thumpertalk.com/forum/showthread.php?t=862495&highlight=axle+blocks Hey Mike, It does look bad in that pic but there is 2 full threads exposed passed the end of the self locking axle nut..It's all sweet.