Goebel LKS4-518-150 GO-NUT LK Series Rivetnut Insert, Unified, 5/16-18 UNC-2B Thread Size (.027-.150 Grip) (0.69-3.81mm Grip) "L" Style Round Body Splined, Flat Head, Steel 1008/1010, Zinc Yellow Trivalent Chromate Per ASTM-B-633, RoHS 3 Compliant