B12-40D-2RS Alternator Bearing 12x40x12 Sealed 12mm Bore Bearing Outer Diameter - 6 1/4 inch (6.25") the N318 outer diameter is

the N318 outer diameter is 190mm and the N318 width is 43mm

Size: 50mm x 80mm x 20mm

6209-ZZ Ball Bearing

Equal BCA 113

B12-40D-2RS Alternator Bearing 12x40x12 Sealed 12mm Bore Bearing Outer Diameter - 6 1/4 inch (6.25") the N318 outer diameter isB12 40D 2RS AB Sealed Ball Bearing 12mm x 40mm x 12mm B12 40D 2RS AB sealed ball bearing, measures an inner diameter of 12mm, outer diameter is 40mm and the width is 12mm, made from durable 52100 alloy steel, commonly known as chrome steel. B12 40D 2RS AB Ball Bearing Deep Groove Ball Bearing Closures: Rubber Seals Material: Chrome Steel Dimensions: 12mm x 40mm x 12mm Metric Bearing Inner Diameter: 12mm Bearing Outer Diameter: 40mm Bearing Width: 12mm