Rivet Screw - TOOGOO(R) 25pcs M6 Rivet Hex Socket Head Cap Screw Barrel Nut Furniture Hardware Product Name : BarrelNuts;Head Type : Hex Head;Hex Key Size : 4mm/0.16" Female Thread Size : M6 x 15mm(D*L);Sleeve Diameter : 8mm/0.3" Cap Diameter : 13mm/0.5";Overall Height : 18mm / 0.7" Material : Metal;Color : Silver Tone