uxcell M5x0.8mm Zinc Plated Nylock Nylon Insert Hex Lock Nuts Black 100pcs Thread Size: (Female)M5; Product Name: Nylon Lock Nuts Material: Zinc Plated; Weight: 109g Package Content: 100(+/-2%)Pcs x Nylon Lock Nuts; Main Color: Black Height: 5mm/0.2"; Pitch: 0.8mm Width Across Flats: 8mm/0.3"; Width Across Corners: 9mm/0.35"