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A small-diameter Grade 8 hex flange lock nut used at high-stress fastening points on agricultural implements, construction attachments, and other equipment subject to continuous vibration. The integral serrated bearing flange bites into the mating surface under torque, eliminating the need for a separate lock washer while providing reliable vibration resistance. Grade 8 heat treatment delivers approximately 40% greater tensile strength than Grade 5 hardware — never substitute a lower grade at locations that specify Grade 8.
WARNING: This product can expose you to chemicals including lead and lead compounds, mineral oils, and phthalates which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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