uxcell 100 Pieces Stainless Steel 304HC Hex Nylock Nyloc Nut A2-70 Product Name : Hex Nylock Nut;Material : 304HC Stainless Steel (A2-70) Nut Type : M4;Height : 5mm / 0.2" Color : Silver Tone Weight : 87g Package Content : 100+/-2%x Hex Nylock Nut