Marson MLR Series Large Flange Ribbed Rivet Nuts feature a ribbed external body for increased torque-out resistance vs conventional Rivet Nut designs. Large flange offers improved push out performance. Overall the MLR Series Rivet Nuts offer the best and highest strength levels. May be installed with all Marson pneumatic and manual Rivet Nut tools. Available in Steel-Zinc Plated or Aluminum.