These 5/8" drop forged nut eye bolts w/ hex nut are a must have in ropes course and challenge course construction! We highly recommending using galvanized washers along with these nut eye bolts when installing these in your ropes or challenge course. A galvanized hex nut is included with the bolt. Description The threads run half of the length of the nut eye bolt giving plenty of room for the nut to tighten down on the bolt. For use in trees or in wooden poles. The galvanized finished stands up to the outdoor elements year after year.