4Pc Black Anodized License Plate Bolts 4Pcs For 10Mm Bolt Car/Truck/Suv A1 for Jeep Wrangler Washer is 18.8mm (.7") diameter. This is a set of 4 washers and 4 bolts. Bolts are 6mm x 20mm, longer than many others out there. These will fit nearly every late model vehicles license plates.