Zinc Plated Hex Nuts - SODIAL(R) M2.5x0.45mm Zinc Plated Nylon Insert Hex Lock Nuts Black 50pcs Thread Size: (Female)M2.5; Product Name: Nylon Lock Nuts Material: Zinc Plated; Main Color: Black Height: 3.5mm/0.14"; Pitch: 0.45mm Width Across Flats: 5mm/0.2"; Width Across Corners: 5.4mm/0.21"