Overview Reviews Product Description Commonly used on shackle bolts. 9/16"-18 thread size 7/8" socket size zinc Product Videos Custom Field Product Reviews Write a Review Write a Review × AFT Fasteners 9/16-18 Locking Nut - Zinc Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *