This lock nut that was sent to me has been used and all of its threads intersect. The only nut I tried to install just twisted and didn't bite the tread. Upon closer inspection with a magnifying glass, I realized why. All four nuts are already crossed. They sent me a used and damaged set. I will not recommend this product and would like a full refund. OBTW I want to add pictures but this damn Revain app is so problematic to attach pictures.