Top Quality Stainless Steel Rivet Nut Rivnut Insert Nutsert - Open end 5/16-18 UNC Large Flange, Knurled Body Material: Stainless Steel Body Diameter: 0.530" Total Length: 0.735" Application hole size: 0.531" Grip Range 0.027” - 0.150” Package: 10 pcs in a bag * PICTURE FOR REFERENCE ONLY.