Crown Bolt 02370 5/16 Inch-18 x 4-1/2 Inch Coarse Thread Steel Carriage Bolts, 100-Count Zinc-plated 5/16 inch-18-18 x 4-1/2 inch carriage bolt For general applications 5/16 inch-18 body diameter and thread pitch 4-1/2-inch fastener length Zinc-plated finish