Wide range of sizes and types to suit many applications with larger than normal outside diameter. All washers are bright zinc plated for increased corrosion resistance. Available in twenty different sizes. Size is outside diameter x inside diameter. 3/4" x 3/16" M5 x 20 3/4" x 1/4" M6 x 20 1" x 3/16" M5 x 25 1" x 1/4" M6 x 25 1" x 5/16" M8 x 25 1" x 3/8" M10 x 25 1.1/4" x 3/16" M5 x 30 1.1/4" x 1/4" M6 x 30 1.1/4" x 5/16" M8 x 30 1.1/4" x 3/8" M10 x 30 1.1/4" x 1/2" M12 x 30 1.1/2" x 3/16" M5 x 40 1.1/2" x 1/4" M6 x 40 1.1/2" x 5/16" M8 x 40 1.1/2" x 3/8" M10 x 40 1.1/2" x 1/2" M12 x 40 2" x 1/4" M6 x 50 2" x 5/16" M8 x 50 2" x 3/8" M10 x 50 2" x 1/2" M12 x 50