M3 M4 M5 M6 M8 M10 M12 M16 M20 FORM A METRIC NYLON PLASTIC FLAT WASHERS WHITE Metric White Nylon Washers Nylon 66 quality Metric Size M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M16, M20 M2 - Outer: 5mm Inner:2.1mm Thickness:0.5mm M2.5 - Outer: 6mm Inner:2.7mm Thickness:0.5mm M3 - Outer: 7mm Inner:3.2mm Thickness:0.5mm M4 - Outer: 9mm Inner:4.3mm Thickness:1.0mm M5 - Outer: 10mm Inner:5.3mm Thickness:1.0mm M6 - Outer: 12.0mm Inner:6.4mm Thickness:1.5mm M8 - Outer:16.0mm Inner:8.4mm Thickness:1.6mm M10 - Outer: 20.0mm Inner:10.5mm Thickness:2.0mm M12 - Outer:24.0mm Inner:13.0mm Thickness:2.5mm M16 - Outer:30.0mm Inner:17.0mm Thickness:3.0mm M20 - Outer:37.0mm Inner:21.0mm Thickness:3.0mm Please select your pack quantity from above.      We are UK  registered company and all of our items are high quality UK stock on great VAT inclusive prices so buy with confidence.