Top Quality Steel Rivet Nut Rivnut Insert Nutsert - Open end 3/8-16 Long UNC Large Flange, Knurled Body Material: Steel Finish: Black Zinc Body Diameter: 0.53" Total Length: 0.84" Application hole size: 0.531" Grip Range 0.150" - 0.311" Package: 10 pcs in a bag * PICTURE FOR REFERENCE ONLY.