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5/16 inch Split Lock Washers from Action Industries are washers that are split and twisted to create two sharp edges. When the nut or bolt is tightened with the washer, it flattens down, pushing the sharp edges into the nut and the bottom surface to lock them into place. Designed to bite into both the nut and the bottom surface to create a reliable lock.
5/16 inch Split Lock Washers
Washers split and twisted
Sharp edges bite into nut and material
Secure locking nut for fasteners