Uxcell a15072100ux0230 M6x1.0mm Stainless Steel Nylock Nylon Insert Hex Lock Nuts (Pack of 50) Thread Size: (Female)M6; Product Name: Nylon Lock Nuts Material: Stainless Steel; Weight: 110g Package Content: 50(+/-2%)Pcs x Nylon Lock Nuts; Main Color: Silver Tone